WILLBROS GROUP INC
SC 13D, 1997-04-04
OIL & GAS FIELD SERVICES, NEC
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                             UNITED STATES
                  SECURITIES AND EXCHANGE COMMISSION
                        Washington, D.C. 20549

                             SCHEDULE 13D
               Under the Securities Exchange Act of 1934


                         WILLBROS GROUP, INC.
- --------------------------------------------------------------------------------
                           (Name of Issuer)

                             Common Stock
- --------------------------------------------------------------------------------
                    (Title of Class of Securities)

                               969199108
- --------------------------------------------------------------------------------
                            (CUSIP Number)


                 GEORGE H. HOWARD, III, DILLON, READ & CO. INC.,
              535 MADISON AVENUE, NEW YORK, NY 10022 (212) 906-7324
- --------------------------------------------------------------------------------
           (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)


                                February 28, 1997
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G
to report the  acquisition  which is the subject of this Schedule 13D,
and is filing this schedule  because of Rule 13d-1(b)(3) or (4), check
the following box |X|.

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class
of securities, and for any subsequent amendment containing information
which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not
be  deemed  to be  "filed"  for  the  purpose  of  Section  18 of  the
Securities  Exchange Act of 1934  ("Act") or otherwise  subject to the
liabilities  of that  section  of the Act but shall be  subject to all
other provisions of the Act (however, see the Notes).

                            Page 1 of 76 Pages

<PAGE>


                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     2      of    76     Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- ----------------------------------------------------------------- --------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Dillon, Read Holding Inc.
          I.R.S. No. 13-3634771
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          N/A
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER
        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        4,023,040
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       4,023,040
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          Dillon, Read Holding Inc. disclaims beneficial ownership of 4,023,040
          shares attributed to it through its ownership of Dillon, Read Inc.
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          28.6%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          HC
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 2 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     3      of   76    Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Dillon, Read Inc.
          I.R.S. No. 13-3404336
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          N/A
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        4,023,040
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       4,023,040
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          Dillon, Read Inc. disclaims beneficial ownership of 4,023,040 shares
          attributed to it through its ownership of Dillon, Read and Co. Inc..
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          28.6%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          HC
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 3 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     4      of    76     Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Dillon, Read & Co. Inc.
          I.R.S. No. 13-1939216
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          N/A
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Connecticut
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        4,023,040
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       4,023,040
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          The reporting person reports 4,023,040 shares held for managed
          accounts and the reporting person disclaims beneficial ownership of
          such shares.
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          28.6%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          BD
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 4 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     5      of    76     Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Concord Partners II, L.P.
          I.R.S. No. 13-3421365
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          WC
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                             |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        451,600
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       451,600
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          451,600
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          3.0%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          PN
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 5 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     6      of   76      Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Concord Partners Japan Limited
          I.R.S. No. 22-3012759
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          WC
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        96,240
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       96,240
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          96,240
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          .7%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          CO
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 6 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     7      of   76      Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Yorktown Energy Partners, L.P.
          I.R.S. No. 13-3603939
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          WC
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        3,324,120
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       3,324,120
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          3,324,120
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          23%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          PN
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 7 of 76 Pages



<PAGE>





                             SCHEDULE 13D

- ----------------------------------    ----------------------------------------
CUSIP No. 969199108                     Page     8      of   76      Pages
          -----------                         -------       --------
- ----------------------------------    ----------------------------------------
- -------------------------------------------------------------------------------
1         NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Lexington Partners IV, L.P.
          I.R.S. No. 13-3665818
- -------------------------------------------------------------------------------
2         CHECK THE APPROXIMATE BOX IF A MEMBER OF A GROUP*           (a) |_|
                                                                      (b) |_|
          N/A
- -------------------------------------------------------------------------------
3         SEC USE ONLY

- -------------------------------------------------------------------------------
4         SOURCE OF FUNDS*

          WC
- -------------------------------------------------------------------------------
5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                              |_|

          N/A
- -------------------------------------------------------------------------------
6         CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
- -------------------------------------------------------------------------------
                             7         SOLE VOTING POWER

        NUMBER OF                      None
          SHARES          ----------------------------------------------------
       BENEFICIALLY          8         SHARED VOTING POWER
         OWNED BY
           EACH                        4,950
        REPORTING         ----------------------------------------------------
       PERSON WITH           9         SOLE DISPOSITIVE POWER

                                       None
                          ----------------------------------------------------
                             10        SHARED DISPOSITIVE POWER

                                       4,950
- -------------------------------------------------------------------------------
11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          4,950
- -------------------------------------------------------------------------------
12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES*                                                         |_|

          N/A
- -------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          .03%
- -------------------------------------------------------------------------------
14        TYPE OF REPORTING PERSON*

          PN
- -------------------------------------------------------------------------------
                 *SEE INSTRUCTIONS BEFORE FILLING OUT!
     INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
      (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                               Page 8 of 76 Pages


<PAGE>







Item 1.  Security and Issuer

          This  Schedule  13D relates to the common stock (the "Common
Stock") of Willbros  Group,  Inc.  (the  "Company"),  whose  principal
executive offices are located at Edificio Torre Banco Germanico, Calle
50y 55 Este, Apartado 850048, Panama 5, Republic of Panama.

Item 2.  Identity and Background

          This  statement is filed by each of the  following  persons:
(i) Dillon,  Read Holding Inc. ("DR Holding");  (ii) Dillon, Read Inc.
("DRI");  (iii) Dillon,  Read & Co. Inc. ("Dillon Read"); (iv) Concord
Partners II, L.P.  ("Concord II"); (v) Concord  Partners Japan Limited
("Concord Japan"); (vi) Yorktown Energy Partners,  L.P.  ("Yorktown");
and (vii)  Lexington  Partners IV, L.P.  ("Lexington  IV"),  which are
sometimes referred to collectively herein as the "Reporting  Persons."
Concord II,  Concord  Japan,  Yorktown and  Lexington IV are sometimes
referred to collectively herein as the "Funds."

          DR Holding is a corporation  organized under the laws of the
State of Delaware,  whose principal office and business address is c/o
The  Corporation  Trust  Company,  1209  Orange  Street,   Wilmington,
Delaware 19801. The principal  business of DR Holding is the ownership
of all of the outstanding shares of common stock of DRI.

          DRI,  a  wholly  owned  subsidiary  of  DR  Holding,   is  a
corporation  organized under the laws of the State of Delaware,  whose
principal office and business address is c/o Corporation Trust Center,
1209 Orange Street, Wilmington,  Delaware 19801. Dillon Read, a wholly
owned subsidiary of DRI, is a corporation  organized under the laws of
the State of Connecticut,  whose principal office and business address
is 535  Madison  Avenue,  New  York,  New York  10022.  The  principal
business of DRI is the ownership of all of the  outstanding  shares of
common stock of Dillon Read,  whose  principal  business is investment
banking and securities brokerage and trading.

          Concord II, a limited  partnership  organized under the laws
of the  State of  Delaware,  has its  principal  office  and  business
address at 535 Madison Avenue, New York, New York 10022. The principal
business of Concord II is investing in venture capital transactions.

          Concord Japan is a corporation  organized  under the laws of
the  Bahamas,  whose  principal  office  and  business  address is c/o
RoyWest Trust Corporation (Bahamas) Limited, West Bay Street,  Nassau,
Bahamas.  The  principal  business of Concord  Japan is  investing  in
venture capital transactions.




<PAGE>



                                     -2-



          Yorktown, a limited partnership  organized under the laws of
the State of Delaware,  has its principal  office and business address
at 535  Madison  Avenue,  New  York,  New York  10022.  The  principal
business of  Yorktown  is  investing  in equity  securities  of energy
investments.  Lexington IV, a limited partnership  organized on behalf
of certain  officers of Dillon Read to invest in securities  issued in
transactions  in which Dillon Read is  involved,  was formed under the
laws  of the  State  of  Delaware  and has its  principal  office  and
business address at 535 Madison Avenue, New York, New York 10022.

          The  partnership   agreement  with  respect  to  Concord  II
provides that the management,  operation and investment  policy (which
includes  the  right to vote or power to  direct  the  disposition  of
securiites)  of the  partnership  shall be vested  exclusively  in its
general  partner,  which is  Venture  Associates  II,  L.P.  ("Venture
Associates  II").  Venture  Associates  II  is a  limited  partnership
organized for the purpose of being the general  partner of Concord II.
Pursuant to the Concord II partnership  agreement,  Venture Associates
II may delegate its authority to manage  Concord II to another  party.
Dillon  Read has been  appointed  manager  of  Concord  II by  Venture
Associates  II,  and as such,  has the  power to vote and the power to
dispose of the securities reported in this Schedule 13D as being owned
by Concord II.

          The partnership  agreement with respect to Yorktown provides
that the management,  operation and investment  policy (which includes
the right to vote or power to direct the disposition of securities) of
the partnership  shall be vested  exclusively in its general  partner,
which is DR Associates  III, L.P. ("DR  Associates").  Pursuant to the
Yorktown  partnership  agreement,   DR  Associates  may  delegate  its
authority  to manage  Yorktown to another  party.  DR  Associates  has
delegated such authority to Dillon Read, its general  partner,  and as
such,  Dillon Read may have the power to vote and the power to dispose
of the  securities  reported  in this  Schedule  13D as being owned by
Yorktown.  The  partnership  agreement  with  respect to  Lexington IV
provides that the management,  operation and investment  policy (which
includes the right to vote and power to direct the disposition



<PAGE>



                                     -3-



of  securities)  of  Lexington IV shall be vested  exclusively  in its
general partner,  which is DRMC Inc. DRMC Inc. is wholly owned by DRI,
and as such,  DRI may have the power to vote and the power to  dispose
of the  securities  reported  in this  Schedule  13D as being owned by
Lexington IV.

          Pursuant  to a  management  agreement,  Dillon Read has been
appointed manager of Concord Japan, and as such, has the power to vote
and the power to dispose of the  securities  reported in this Schedule
13D as being owned by Concord Japan.

          The names, addresses, citizenships and principal occupations
or employments of the respective  directors and executive  officers of
DR Holding,  DRI and Dillon Read are set forth in Exhibits A, B and C,
respectively,  attached  hereto,  which  are  incorporated  herein  by
reference.   The  names,   addresses,   citizenships   and   principal
occupations or employments of the directors and executive  officers of
Concord  Japan are set forth in Exhibit D, attached  hereto,  which is
incorporated herein by reference.

            Except as set forth in  Exhibits  A, B, C and D hereto and
in the following paragraph, none of the Reporting Persons, nor, to the
best  knowledge  of any of the  Reporting  Persons,  any other  person
identified pursuant to this Item 2, within the last five years was (i)
convicted in a criminal  proceeding  (excluding  traffic violations or
similar  misdemeanors),  or (ii) a party  to a civil  proceeding  of a
judicial or  administrative  body of competent  jurisdiction  and as a
result of such  proceeding was or is subject to a judgment,  decree or
final order enjoining future violations of, or prohibiting  activities
subject  to,  federal  or state  securities  laws or a finding  of any
violations of such laws.

            On January  16,  1992,  Dillon  Read  (along with 97 other
securities   firms),   without  admitting  or  denying  any  findings,
consented  to  the  entry  of  an  Order  in   settlement  of  an  SEC
Administrative  Proceeding (File No. 3-7646) entitled In the Matter of
the Distribution of Securities Issued by Certain Government  Sponsored
Enterprises  ("GSE").  The Order stated the SEC's findings that Dillon
Read made and kept  certain  records that did not  accurately  reflect
Dillon  Read's   customers'  orders  for  certain  GSE  securities  in
violation of Section 17(a) (and Rules 17a-3 and 17a-4 thereunder). The
Order  further  provided  that Dillon Read shall cease and desist from
any violation in the future,  pay a penalty of $100,000,  and maintain
policies  and   procedures   reasonably   designed  to  ensure  future
compliance  with the  provisions  of Section 17(a) and Rules 17a-3 and
17a-4 thereunder.

Item 3.  Source and Amount of Funds or Other Consideration

          On April 7,  1992,  Dillon  Read,  as  agent,  and the Funds
invested in preferred stock of the Company  (the  "Preferred  Stock"),
which converted (post-split) into shares of Common Stock.



<PAGE>



                                     -4-


          With respect to the investments made by each of the Funds in
the Company,  Concord II,  Concord  Japan,  Yorktown and  Lexington IV
purchased the shares of the Company  purchased by it with  partnership
funds made available to it pursuant to a capital call from its limited
partners.  As set forth under Items 5 and 6 below,  146,130  shares of
Common Stock owned of record by Dillon Read (the "Agency  Shares") are
held by it as agent for certain  managing  directors,  former managing
directors,  officers  and former  officers  of Dillon  Read  listed on
Exhibit E, attached hereto and incorporated herein by reference, under
powers of attorney  pursu- ant to which  Dillon Read has been  granted
sole  voting  power and sole  investment  power  with  respect to such
securities.  The  source  and the  aggregate  amount of funds  used to
purchase the Common  Stock by each of the persons  listed on Exhibit E
hereto is set forth in  Exhibit E hereto.  The table  below sets forth
the  aggregate  amount of funds  used in making the  purchases  of the
Common Stock by each of the Funds and Dillon Read, as agent.













<PAGE>



                                     -5-

<TABLE>
<CAPTION>

                                 Common Stock
                                 Originally            Total Price of
Purchaser                        Purchased(1)           Common Stock
- ---------                        ------------          --------------
<S>                               <C>                  <C>

Concord II                         651,600              $ 2,172,000
Concord Japan                       96,240                  320,800
Yorktown                         3,324,120               11,080,400
Lexington IV                       146,130                  487,100
Dillon Read                      

</TABLE>


Item 4.  Purpose of Transaction

            All of the shares of Common Stock were acquired by the
Reporting Persons in transactions originally involving investments by
the Reporting Persons in the Company, as more fully described in Item
3 of this Schedule 13D.

            The Funds  acquired  the Common  Stock  owned of record by
them in the ordinary course of their respective  investment activities
and as contemplated  by their  organizational  documents.  Dillon Read
acquired the 146,130  Agency  Shares owned of record by it pursuant to
powers of  attorney  executed by the  individuals  listed on Exhibit E
hereto.

            By  reason of Dillon  Read's  relationship  with the Funds
(see Item 2),  Dillon Read may be in a position to  influence  whether
the Company engages in certain corporate transactions, including those
transactions  enumerated under paragraphs (a) through (j) of Item 4 of
Schedule 13D.


- --------

1    Reflects  shares of Common  Stock issued upon  conversion  of the
     Preferred Stock and after a stock split of 30 for 1.


<PAGE>



                                     -6-


            Except  as  described  in this  Statement,  as of the date
hereof,  the Reporting  Persons have not formulated any specific plans
or proposals  which relate to or would result in: (a) the  acquisition
by  any  person  of  additional  securities  of  the  Company  or  the
disposition  of  securities  of  the  Company;  (b)  an  extraordinary
corporate transaction, such as a merger, reorganization or liquidation
involving the Company;  (c) a sale or transfer of a material amount of
assets  of the  Company;  (d)  any  change  in the  present  board  of
directors  or  management  of the  Company,  including  any  plans  or
proposals to change the number or term of directors or  management  of
the Company,  including any plans or proposals to change the number or
term of directors or to fill any existing  vacancies on the board; (e)
any material change in the present  capitalization  or dividend policy
of the  Company;  (f)  any  other  material  change  in the  Company's
business or corporate structure;  (g) changes in the Company's charter
or bylaws or other actions which may impede the acquisition of control
of the Company by any person; (h) causing a class of securities of the
Company to be delisted from a national securities exchange or to cease
to be authorized to be quoted in an inter-dealer quotation system of a
registered  national  securities  association;  (i) causing a class of
equity securities of the Company to become eligible for termination of
registration  pursuant to Section 12(g)(4) of the Securities  Exchange
Act of 1934, as amended (the "Act");  or (j) any action similar to any
of those enumerated above.

Item 5.  Interests in Securities of the Issuer

          (a) By reason of their  relationship  with  Dillon Read (see
Item 2), as of  February  28,  1997,  DR Holding and DRI may be deemed
pursuant  to Rule 13d-3 under the Act ("Rule  13d-3") to  beneficially
own  4,023,040  shares  of  Common  Stock,  representing  28.6% of the
outstanding  shares of Common  Stock  reported  by the  Company  to be
outstanding  at  December  31,  1996 (the  "Outstanding  Shares").  DR
Holding and DRI disclaim beneficial  ownership of all shares of Common
Stock held by Dillon Read and the Funds.

          By reason of Dillon Read's  relationship with the Funds (see
Item 2), as of February 28, 1997,  Dillon Read may be deemed  pursuant
to Rule 13d-3 to  beneficially  own  4,023,040  shares of Common Stock
(including  the 146,130 Agency Shares held by Dillon Read as agent for
the  persons  listed on Exhibit E hereto),  representing  28.6% of the
Outstanding Shares.





<PAGE>



                                     -7-


          As of  February  28,  1997,  Concord  II  beneficially  owns
451,600 shares of Common Stock,  representing  3.0% of the Outstanding
Shares. Concord Japan beneficially owns 96,240 shares of Common Stock,
representing .7% of the Outstanding Shares. Yorktown beneficially owns
3,324,120   shares  of  Common  Stock,   representing   23.0%  of  the
Outstanding  Shares.  Lexington IV  beneficially  owns 4,950 shares of
Common Stock, representing .03% of the Outstanding Shares.

          In  addition,   as  of  February  28,  1997,   DRI  and  the
individuals  named in Exhibit E hereto  may be deemed to  beneficially
own the 146,130 Agency Shares,  representing  1.0% of the  Outstanding
Shares; however,  pursuant to powers of attorney executed by each such
individual in favor of Dillon Read,  Dillon Read has been granted sole
voting  power and sole  investment  power  with  respect to the Agency
Shares.  Accordingly,  each such person disclaims beneficial ownership
of the Agency Shares held by Dillon Read for his economic benefit. The
name of each such  person  and the  number of Agency  Shares and other
shares of Common Stock and the percentage of the Outstanding Shares as
to which each such person  disclaims or affirms  beneficial  ownership
are set forth in  Exhibit E hereto,  which is  incorporated  herein by
reference.

          Pursuant to its partnership agreement, on February 28, 1997,
Concord II  distributed an aggregate of 200,000 shares of Common Stock
to its partners.

            Except as set forth herein,  to the best  knowledge of the
Reporting Persons, none of the other persons identified in this filing
currently owns, or has any right to acquire,  any shares of the Common
Stock.

            (b) As  noted  in Items 2 and  5(a),  Dillon  Read has the
voting power and investment power with respect to the shares of Common
Stock  reported in this Statement as being  beneficially  owned by the
Funds,  and with  respect  to the  Agency  Shares.  By reason of their
relationship with one another,  Dillon Read, DRI and DR Holding may be
deemed to share voting and dispositive  powers as to all of the shares
of Common  Stock  reported in Item 5(a) that Dillon Read may be deemed
to  beneficially  own;  however,  as noted  above,  DR Holding and DRI
disclaim beneficial ownership of such shares.

          (c) None.



<PAGE>



                                     -8-


            (d) To the best  knowledge of the  Reporting  Persons,  no
person other than those  identified  in this Schedule has the right to
receive or the power to direct the receipt of dividends  from,  or the
proceeds from the sale of, the securities reported on this Schedule.

            (e)   Not applicable.

Item 6.     Contracts, Arrangements, Understandings or Rela-
            tionships with Respect to Securities of the Issuer

            None.

Item 7.  Material to be Filed as Exhibits

      Exhibit A     -  Executive Officers and Directors of Dillon,
                        Read Holding Inc.

      Exhibit B     -  Executive Officers and Directors of Dillon,
                        Read Inc.

      Exhibit C     -  Executive Officers and Directors of Dillon,
                        Read & Co. Inc.

      Exhibit D     -  Executive Officers and Directors of Concord
                        Partners Japan Limited.

      Exhibit E     -  Ownership of Common Stock by Managing Direc-
                        tors, Former Managing Directors, Officers and
                        Former Officers of Dillon, Read & Co. Inc.

      Exhibit F     -  Joint Filing Agreement Pursuant to Rule
                        13d-1(f).

      Exhibit G     -  Form of Power of Attorney Executed by Persons
                        Listed in Exhibit E.

















<PAGE>






                              SIGNATURES



      The undersigned  certify that, after  reasonable  inquiry and to
the best of their respective knowledge and belief, the information set
forth in the Schedule 13D is true, complete and correct.


                                    DILLON, READ HOLDING INC.



                                  By:   /s/ David W. Niemiec
                                        ----------------------------
                                        Name:   David W. Niemiec
                                        Title:  Vice Chairman


                                    DILLON, READ INC.



                                  By:   /s/ David W. Niemiec
                                        ----------------------------
                                        Name:   David W. Niemiec
                                        Title:  Secretary


                                    DILLON, READ & CO. INC.



                                  By:   /s/ David W. Niemiec
                                        ----------------------------
                                        Name:   David W. Niemiec
                                        Title:  Vice Chairman


                                    LEXINGTON PARTNERS IV, L.P.

                                    By:  DRMC Inc.,
                                          its General Partner



                                  By:   /s/ David W. Niemiec
                                        -------------------------
                                        Chairman

















<PAGE>




                                    CONCORD PARTNERS II, L.P.

                                    By:  Venture Associates II, L.P.,
                                          its General Partner

                                    By:  Dillon, Read Inc.,
                                          its General Partner



                                  By:   /s/ Peter A. Leidel
                                        --------------------------
                                        Attorney-in-Fact


                                    CONCORD PARTNERS JAPAN LIMITED



                                  By:   /s/ Peter A. Leidel
                                        --------------------------
                                        Attorney-in-Fact


<PAGE>



                                    YORKTOWN ENERGY PARTNERS, L.P.

                                    By:  DR Associates III, L.P.,
                                         its General Partner


                                    By:  Dillon, Read & Co. Inc.,
                                         its General Partner


                                    By:  /s/ Bryan H. Lawrence
                                         ---------------------------
                                         Managing Director





Dated:  April 3, 1997




<PAGE>







                          SCHEDULE 13D

                            EXHIBIT A

  Executive Officers and Directors of Dillon, Read Holding Inc.


NAME:                         John P. Birkelund

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a)  Name:          Dillon, Read & Co. Inc.
          (b)  Address:       535 Madison Avenue
                          New York, NY 10022
          (c)  Title:         Chairman, Director and Managing
                              Director of Dillon, Read & Co. Inc.

CITIZENSHIP:                  USA


NAME:                         David W. Niemiec

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a)  Name:          Dillon, Read & Co. Inc.
          (b)  Address:       535 Madison Avenue
                          New York, NY 10022
          (c)  Title:         Vice Chairman, Director, Managing
                              Director, Treasurer and Secretary
                              of Dillon, Read & Co. Inc.

CITIZENSHIP:                  USA












<PAGE>



                               -2-



                          SCHEDULE 13D

                            EXHIBIT A

  Executive Officers and Directors of Dillon, Read Holding Inc.


NAME:                         Francois de Saint Phalle

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a)  Name:          Dillon, Read & Co. Inc.
          (b)  Address:       535 Madison Avenue
                          New York, NY 10022
              (c) Title: Vice Chairman, Director and Man-
                              aging Director of Dillon, Read &
                              Co. Inc.

CITIZENSHIP:                  USA


NAME:                         Franklin W. Hobbs, IV

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                              New York, NY 10022

PRINCIPAL OCCUPATION:

          (a)  Name:          Dillon, Read & Co. Inc.
          (b)  Address:       535 Madison Avenue
                              New York, NY 10022
            (c) Title: President, Chief Executive Officer,
                              Director and Managing Director of
                              Dillon, Read & Co. Inc.

CITIZENSHIP:                  USA











<PAGE>



                               -3-



                          SCHEDULE 13D

                            EXHIBIT A

  Executive Officers and Directors of Dillon, Read Holding Inc.


NAME:                         Leendert C. Grijns

RESIDENCE OR                  Internationale Nederlanden (U.S.)
BUSINESS ADDRESS:             Capital Corporation
                         135 East 57th Street
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a)  Name:          Internationale Nederlanden (U.S.)
                          Capital Corporation
          (b)  Address:       135 East 57th Street
                          New York, NY 10022
          (c)  Title:         Chairman

CITIZENSHIP:                  Dutch


NAME:                         Jan Hessel Lindenbergh

RESIDENCE OR                  ING Bank
BUSINESS ADDRESS:             De Amsterdam Poort
                              1102 MG Amsterdam Zuiboost
                            The Netherlands

PRINCIPAL OCCUPATION:

          (a)  Name:          ING Bank
          (b)  Address:       De Amsterdam Poort
                              1102 MG Amsterdam Zuiboost
                            The Netherlands
          (c)  Title:         Director

CITIZENSHIP:                  HOLLAND











<PAGE>






                          SCHEDULE 13D

                            EXHIBIT B

      Executive Officers and Directors of Dillon, Read Inc.


NAME:                         John P. Birkelund

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Chairman, Director and Managing
                       Director of Dillon, Read
                              & Co. Inc.

CITIZENSHIP:                  USA


NAME:                         David W. Niemiec

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Vice Chairman, Director, Managing
                              Director, Treasurer and Secretary
                              of Dillon, Read & Co. Inc.

CITIZENSHIP:                  USA












<PAGE>



                               -2-



                          SCHEDULE 13D

                            EXHIBIT B

      Executive Officers and Directors of Dillon, Read Inc.


NAME:                         Francois de Saint Phalle

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
              (c) Title: Vice Chairman, Director and Man-
                              aging Director of Dillon, Read
                                & Co. Inc.

CITIZENSHIP:                  USA


NAME:                         Franklin W. Hobbs, IV

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                              New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                              New York, NY 10022
            (c) Title: President, Chief Executive Officer,
                              Director and Managing Director of
                              Dillon, Read & Co. Inc.

CITIZENSHIP:                  USA










<PAGE>




                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         John P. Birkelund

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Chairman, Director and Managing
                              Director

CITIZENSHIP:                  USA


NAME:                         David W. Niemiec

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Vice Chairman, Director, Managing
                              Director, Treasurer and Secretary

CITIZENSHIP:                  USA
















<PAGE>



                               -2-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Francois de Saint Phalle

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
              (c) Title: Vice Chairman, Director and Man-
                              aging Director

CITIZENSHIP:                  USA


NAME:                         Franklin W. Hobbs, IV

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
            (c) Title: President, Chief Executive Officer,
                              Director and Managing Director

CITIZENSHIP:                  USA













<PAGE>



                               -3-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Barbara T. Alexander

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Sharyar Aziz

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                               -4-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Tamara A. Baum

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         James H. Brandi

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                               -5-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         William S. Brenizer

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         James C. Brennan

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                               -6-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         John G. Brim

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Michael A. Cilia

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                               -7-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Frank V. Colombo

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Kenneth S. Crews

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA











<PAGE>



                               -8-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         David M. Dickson, Jr.

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Charles P. Durkin, Jr.

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                               -9-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Blair W. Effron

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Raul P. Esquivel

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -10-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Peter M. Flanigan

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director

CITIZENSHIP:                  USA


NAME:                         Thomas J. Hartfield

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -11-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         John H.F. Haskell, Jr.

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Anthony B. Helfet

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             555 California Street, Suite 4950
                        San Francisco, CA 94104

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        555 California Street, Suite 4950
                        San Francisco, CA 94104
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -12-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         William O. Hiltz

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Robert H. Hotz

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                              -13-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         James W. Hunt

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Peter H. Imhoff

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA
















<PAGE>



                              -14-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Yerger Johnstone

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             60 London Wall
                            London EC2M 5TQ
                              United Kingdom

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  UK


NAME:                         Craig A.T. Jones

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             260 Franklin Street - 15th Floor
                           Boston, MA 02110

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        260 Franklin Street - 15th Floor
                           Boston, MA 02110
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA













<PAGE>



                              -15-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Kenjiro Kawaguchi

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             Imperial Tower, 6th Floor
                         1-1-1 Uschisaiwai-cho
                              Chiyoda-ku
                              Tokyo, Japan

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        Imperial Tower, 6th Floor
                         1-1-1 Uschisaiwai-cho
                              Chiyoda-ku
                              Tokyo, Japan
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  Japan


NAME:                         Patrick J. Landers

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -16-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Bryan H. Lawrence

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         J. Richard Leaman, III

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA
















<PAGE>



                              -17-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Richard R. Macek

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             120 Wall Street
                          New York, NY 10005

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        120 Wall Street
                          New York, NY 10005
          (c) Title:          Controller, Director and Managing
                              Director

CITIZENSHIP:                  USA


NAME:                         Daniel F. Marciano

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -18-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Cynthia R. Melcher

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Richard J. Milligan

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -19-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Richard H. Montague

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Robert Moulton-Ely

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                              -20-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         John H. Mullin, III

RESIDENCE OR                  Ridgeway Farm Inc.
BUSINESS ADDRESS:             Route 2
                              Box 380
                          Brookneal, VA 24528

PRINCIPAL OCCUPATION:

          (a) Name:           Ridgeway Farm Inc.
          (b) Address:        Route 2
                              Box 380
                          Brookneal, VA 24528
          (c) Title:          Shade Tree Farmer

CITIZENSHIP:                  USA


NAME:                         Christian L. Oberbeck

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA

















<PAGE>



                              -21-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Victor A. Pelson

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director

CITIZENSHIP:                  USA


NAME:                         Robert A. Pilkington

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  UK

















<PAGE>



                              -22-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Thomas L. Piper, III

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Jerome H. Powell

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA



<PAGE>



                              -23-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         William P. Powell

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Eric W. Roberts

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA



<PAGE>



                              -24-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Kenneth M. Schmidt

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         H.C. Bowen Smith

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                              -25-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Richard R.S. Smith

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Danforth H. Starr

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director

CITIZENSHIP:                  USA















<PAGE>



                              -26-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Jason D. Sweet

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        3950 Trammel Crow Lane
                           2001 Ross Avenue
                           Dallas, TX 75201
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         F. Davis Terry, Jr.

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA













<PAGE>



                              -27-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Lorenzo D. Weisman

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  France


NAME:                         Edward B. Whitney

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA




<PAGE>



                              -27-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         George A. Wiegers

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director

CITIZENSHIP:                  USA


NAME:                         John E. Wilson

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA















<PAGE>



                              -28-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Robert A. Young

RESIDENCE OR                  Dillon, Read & Co. Inc.
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Dillon, Read & Co. Inc.
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Director and Managing Director

CITIZENSHIP:                  USA


NAME:                         Simon A. Borrows

RESIDENCE OR                  Baring Brothers International
                              Limited
BUSINESS ADDRESS:             60 London Wall
                            London EC2M 5TQ
                              United Kingdom

PRINCIPAL OCCUPATION:

          (a) Name:           Baring Brothers International
                              Limited
          (b) Address:        60 London Wall
                            London EC2M 5TQ
                              United Kingdom
          (c) Title:          Director

CITIZENSHIP:                  UK















<PAGE>



                              -29-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Leendert C. Grijns

RESIDENCE OR                  Internationale Nederlanden (U.S.)
BUSINESS ADDRESS:             Capital Corporation
                         135 East 57th Street
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Internationale Nederlanden (U.S.)
                          Capital Corporation
          (b) Address:        135 East 57th Street
                          New York, NY 10022
          (c) Title:          Chairman

CITIZENSHIP:                  Dutch


NAME:                         James R.C. Lupton

RESIDENCE OR                  Baring Brothers International
                              Limited
BUSINESS ADDRESS:             60 London Wall
                            London EC2M 5TQ
                              United Kingdom

PRINCIPAL OCCUPATION:

          (a) Name:           Baring Brothers International
                              Limited
          (b) Address:        60 London Wall
                            London EC2M 5TQ
                              United Kingdom
          (c) Title:          Executive Director

CITIZENSHIP:                  UK











<PAGE>



                              -30-



                          SCHEDULE 13D

                            EXHIBIT C

   Executive Officers and Directors of Dillon, Read & Co. Inc.


NAME:                         Michael D.G. Ross

RESIDENCE OR                  Baring Brothers International
                              Limited
BUSINESS ADDRESS:             535 Madison Avenue
                          New York, NY 10022

PRINCIPAL OCCUPATION:

          (a) Name:           Baring Brothers International
                              Limited
          (b) Address:        535 Madison Avenue
                          New York, NY 10022
          (c) Title:          Managing Director

CITIZENSHIP:                  UK



<PAGE>



                             SCHEDULE 13D

                               EXHIBIT D

                  Executive Officers and Directors of
                    Concord Partners Japan Limited


NAME:                         Heiichi Hamaoka

RESIDENCE OR                  Nissan Motor Co., Ltd.
BUSINESS ADDRESS:             6-17-1, Ginza, Chuo-Ku
                              Tokyo, Japan

PRINCIPAL OCCUPATION:

          (a) Name:           Nissan Motor Co., Ltd.
          (b) Address:        6-17-1, Ginza, Chuo-Ku
                              Tokyo, Japan
          (c) Title:          Managing Director,
                              Nissan Motor Co., Ltd.

CITIZENSHIP:                  Japan


NAME:                         Gentaro Kawase

RESIDENCE OR                  Nippon Life Insurance Company
BUSINESS ADDRESS:             3-5-12, Imabashi, Chuo-ku
                              Osaka, Japan

PRINCIPAL OCCUPATION:

          (a) Name:           Nippon Life Insurance Company
          (b) Address:        3-5-12, Imabashi, Chuo-ku
                              Osaka, Japan
          (c) Title:          Chairman, Nippon Life Insurance
                              Company

CITIZENSHIP:                  Japan












<PAGE>


                                      -2-


                             SCHEDULE 13D

                               EXHIBIT D

                  Executive Officers and Directors of
                    Concord Partners Japan Limited


NAME:                               Takashi Imai

RESIDENCE OR                        Nippon Steel Corporation
BUSINESS ADDRESS:                   2-6-3, Otemachi, Chiyoda-ku
                             Tokyo, Japan

PRINCIPAL OCCUPATION:

            (a) Name:               Nippon Steel Corporation
            (b) Address:            2-6-3, Otemachi, Chiyoda-ku
                             Tokyo, Japan
            (c) Title:              Representative Director and Exec-
                                    utive Vice President, Nippon
                                    Steel Corporation

CITIZENSHIP:                        Japan


NAME:                               Yoh Kurosawa

RESIDENCE OR                        The Industrial Bank of Japan, Ltd.
BUSINESS ADDRESS:                   1-3-3, Marunouchi, Chiyoda-ku
                             Tokyo, Japan

PRINCIPAL OCCUPATION:

            (a) Name:               The Industrial Bank of Japan, Ltd.
            (b) Address:            1-3-3, Marunouchi, Chiyoda-ku
                             Tokyo, Japan
            (c) Title:              President, The Industrial Bank of
                              Japan, Ltd.

CITIZENSHIP:                        Japan












<PAGE>


                                      -3-


                             SCHEDULE 13D

                               EXHIBIT D

                  Executive Officers and Directors of
                    Concord Partners Japan Limited

NAME:                               Kenjiro Kawaguchi

RESIDENCE OR                        Dillon, Read & Co. Inc.
BUSINESS ADDRESS:                   Imperial Tower
                                    6th Floor
                                    1-1-1 Uschisaiwai-Cho
                                    Chiyoda-Ku
                                    Toyko, Japan

PRINCIPAL OCCUPATION:

            (a) Name:               Dillon, Read & Co. Inc.
            (b) Address:            Imperial Tower
                                    6th Floor
                                    1-1-1 Uschisaiwai-Cho
                                    Chiyoda-Ku
                                    Toyko, Japan
            (c) Title:              Director and Managing Director

CITIZENSHIP:                        Japan


NAME:                               Amerex S.A.

RESIDENCE OR                        Coutts & Company (Bahamas) Ltd.
BUSINESS ADDRESS:                   West Bay Street
                                    Nassau, Bahamas

PRINCIPAL OCCUPATION:

            (a) Name:               Coutts & Company (Bahamas) Ltd.
            (b) Address:            West Bay Street
                                    Nassau, Bahamas
            (c) Title:              Supervisor of Company Services and
                                    Secretary of Coutts & Company
                                    (Bahamas) Ltd.

CITIZENSHIP:                        Bahamas











<PAGE>


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



           NAME:                   Charles A. Ballard
           NUMBER OF SHARES
           BENEFICIAL OWNERSHIP
                    DISCLAIMED:    3,102
              AMOUNT AND SOURCE
                      OF FUNDS:    $10,340
                  PERCENTAGE OF
             OUTSTANDING COMMON
                          STOCK:   .02%


           NAME:                   John P. Birkelund(1)
           NUMBER OF SHARES
           BENEFICIAL OWNERSHIP
                    DISCLAIMED:    24,171
              AMOUNT AND SOURCE
                      OF FUNDS:    $80,570
                  PERCENTAGE OF
             OUTSTANDING COMMON
                         STOCK:    .2%


- --------

1    In addition,  Mr.  Birkelund owns 15,000 shares,  which he purchased on
     August 16, 1996 in the open  market at $9.625 per share.  On  Septem-
     ber  4,  1996,  Mr.  Birkelund purchased  800 shares in the open market
     at $9.625 per share,  which shares are  for the benefit of the grand-
     children of Mr. Birkelund and are registered  under the  Uniform
     Gifts to Minors  Act of New York.  The beneficial ownership of such
     shares is disclaimed by Mr. Birkelund.



<PAGE>
                                 -2-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



                      NAME:              Charles P. Durkin, Jr.(2)
                       NUMBER OF SHARES
                   BENEFICIAL OWNERSHIP
                            DISCLAIMED:  7,755
                      AMOUNT AND SOURCE
                              OF FUNDS:  $25,850
                          PERCENTAGE OF
                     OUTSTANDING COMMON
                                 STOCK:  .05%


                      NAME:              Peter M. Flanigan
                       NUMBER OF SHARES
                   BENEFICIAL OWNERSHIP
                            DISCLAIMED:  6,048
                      AMOUNT AND SOURCE
                              OF FUNDS:  $20,160
                          PERCENTAGE OF
                     OUTSTANDING COMMON
                                 STOCK:  .04%


- --------

2    In addition,  Mr. Durkin owns 10,000 shares which he purchased in
     the open market. 5,000 shares were purchased on August 19, 1996 at
     $10.00 per share and 5,000  shares were  purchased on October 22,
     1996 at $9.75 per share.


<PAGE>
                                 -3-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Gerald Greenwald
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  9,651
            AMOUNT AND SOURCE
                    OF FUNDS:  $32,170
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .07%


         NAME:                 Franklin W. Hobbs, IV(3)
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  6,048
            AMOUNT AND SOURCE
                    OF FUNDS:  $20,160
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .04%


- ----------

3    On August 15, 1996, Mr. Hobbs  purchased 2,000 shares in the open market at
     $9.625 per share, which shares are for the benefit of the grandchildren
     of Mr. Hobbs and are registered  under  the  Uniform  Gifts to  Minors
     Act  of New  York.  The beneficial ownership of such shares is disclaimed
     by Mr. Hobbs.

<PAGE>
                                 -4-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Bryan H. Lawrence(4)
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  18,618
            AMOUNT AND SOURCE
                    OF FUNDS:  $62,060
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .1%


         NAME:                 John H. Mullin, III
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  4,653
            AMOUNT AND SOURCE
                    OF FUNDS:  $15,510
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .03%

- ----------

4       On August 15, 1996, Elizabeth D. Lawrence, the wife of Bryan H.
        Lawrence, purchased 4,000 shares in the open market at $9.625
        per share.  The beneficial ownership of such shares is dis-
        claimed by Mr. Lawrence.
<PAGE>
                                 -5-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Robert A. Pilkington(5)
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  3,102
            AMOUNT AND SOURCE
                    OF FUNDS:  $10,340
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .02%


         NAME:                 H.C. Bowen Smith
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  4,839
            AMOUNT AND SOURCE
                    OF FUNDS:  $16,130
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .03%


- --------

5    In addition,  Mr. Pilkington owns 3,000 shares which he purchased
     in the open market on August 19, 1996 at $10.00 per share.


<PAGE>
                                 -6-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Wayne Thornbrough
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  7,758
            AMOUNT AND SOURCE
                    OF FUNDS:  $25,860
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .05%


         NAME:                 Edward B. Whitney
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  6,048
            AMOUNT AND SOURCE
                    OF FUNDS:  $20,160
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .04%


<PAGE>
                                 -7-




                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 George A. Wiegers(6)
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  31,029
            AMOUNT AND SOURCE
                    OF FUNDS:  $103,430
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .2%


         NAME:                 Richard C. Yancey
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  1,551
            AMOUNT AND SOURCE
                    OF FUNDS:  $5,170
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .01%


- --------

6    In addition, Mr. Wiegers owns 25,000 shares which he purchased in
     the open market on August 15, 1996, 15,000 shares were purchased
     at $9.75 per share and 10,000 were purchased at $9.625 per share.

     On November 19, 1996,  Mr.  Wiegers  purchased  500 shares in the
     open  market at $10.00 per  share,  which  shares are  for the
     benefit of the grandchildren of Mr. Wiegers and are registered
     under the Uniform Gifts to Minors Act of Colorado.  The beneficial
     ownership of such shares is disclaimed by Mr. Wiegers.


<PAGE>
                                 -8-




                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Douglas A. Darby
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  1,800
            AMOUNT AND SOURCE
                    OF FUNDS:  $6,000
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .01%


         NAME:                 Glenn Hall
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  621
            AMOUNT AND SOURCE
                    OF FUNDS:  $2,070
                PERCENTAGE OF
           OUTSTANDING COMMON
                        STOCK: .004%


<PAGE>
                                 -9-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 W. Howard Keenan, Jr.(7)
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  4,653
            AMOUNT AND SOURCE
                    OF FUNDS:  $15,510
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .03%


         NAME:                 James F. Reilly
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  1,800
            AMOUNT AND SOURCE
                    OF FUNDS:  $6,000
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .01%

- --------

7    In addition,  Mr.  Keenan owns 4,000 shares which he purchased in
     the open market.  2,000 shares were  purchased on August 15, 1996
     at $9.625 per share and 2,000 shares were purchased on August 16,
     1996 at $9.875 per share.



<PAGE>
                                 -10-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 Bret E. Russell
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  1,209
            AMOUNT AND SOURCE
                    OF FUNDS:  $4,030
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .008%


         NAME:                 Stuart L. Sindell
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  465
            AMOUNT AND SOURCE
                    OF FUNDS:  $1,550
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .003%


<PAGE>
                                 -11-


                             SCHEDULE 13D

                               EXHIBIT E

Ownership of Common Stock by Managing Directors, Former Managing
Directors, Officers and Former Officers of Dillon, Read & Co. Inc.



         NAME:                 James Treco
             NUMBER OF SHARES
         BENEFICIAL OWNERSHIP
                  DISCLAIMED:  1,209
            AMOUNT AND SOURCE
                    OF FUNDS:  $4,030
                PERCENTAGE OF
           OUTSTANDING COMMON
                       STOCK:  .008%











<PAGE>



                          SCHEDULE 13D

                            EXHIBIT F


                     Joint Filing Agreement
                    Pursuant to Rule 13d-1(f)


          The  undersigned  hereby  agree,  pursuant to Rule  13d-1(f)
under  the  Securities  Exchange  Act of 1934,  as  amended,  that the
annexed Statement on Schedule 13D and all amendments  thereto shall be
filed on behalf of each of them.

                             DILLON, READ HOLDING INC.



                             By: /s/ David W. Niemiec
                                 -----------------------------
                                 Name:   David W. Niemiec
                                 Title:  Vice Chairman



                             DILLON, READ INC.



                             By: /s/ David W. Niemiec
                                 -----------------------------
                                 Name:   David W. Niemiec
                                 Title: Secretary



                             DILLON, READ & CO. INC.



                             By: /s/ David W. Niemiec
                                 -----------------------------
                                 Name:   David W. Niemiec
                                 Title:  Vice Chairman



                             LEXINGTON PARTNERS IV, L.P.

                             By:  DRMC Inc.,
                                  its General Partner



                             By:  /s/ David W. Niemiec
                                  ------------------------------
                                   Chairman


<PAGE>




                       CONCORD PARTNERS II, L.P.


                             By:  Venture Associates II, L.P.,
                                  its General Partner

                        By: Dillon, Read Inc.,
                                  its General Partner



                             By:  /s/ Peter A. Leidel
                                  ------------------------------
                           Attorney-in-Fact


                             CONCORD PARTNERS JAPAN LIMITED


                             By:  /s/ Peter A. Leidel
                                  ------------------------------
                                  Attorney-in-Fact


<PAGE>



           
                             YORKTOWN ENERGY PARTNERS, L.P.

                             By:  DR Associates III, L.P.,
                                  its General Partner

                             By:  Dillon, Read & Co. Inc.,
                                  its General Partner


                             By:  /s/ Bryan H. Lawrence
                                  -------------------------
                                  Managing Director


Dated:  April 3, 1997
<PAGE>




                          SCHEDULE 13D

                            EXHIBIT G

                        Power of Attorney


          KNOW ALL MEN BY THESE PRESENTS,  that the undersigned hereby
constitutes  and appoints  Dillon,  Read & Co. Inc.  ("Dillon  Read"),
acting  through  any of its  duly  authorized  officers,  the true and
lawful agent and  attorney-in-fact  of the undersigned with respect to
all matters arising in connection with the under- signed's  accepting,
holding  and  disposing  of  investment   opportunities  that  may  be
presented  by  Dillon  Read to the  undersigned  from  time  to  time,
including  but not limited to (i)  investments  in  companies in which
Concord Partners, a New York limited partnership, Concord Partners II,
a Delaware limited partnership,  Saratoga Partners, a Delaware limited
partnership,  Saratoga  Partners II, a Delaware  limited  partnership,
Yorktown Energy Partners, a Delaware limited  partnership,  The Second
Charterhouse  Buy-Out  Fund, a Delaware  limited  partnership,  France
Capital  Developpement,  a fund organized under the laws of France, or
The Sudimer Buy-Out Fund N.V., a Netherlands Antilles corporation,  or
any similar investment fund is also an investor,  and (ii) investments
directly  in Dillon,  Read  Industrial  Development  Capital  Fund,  a
limited  partnership  established  under  the  laws  of  England,  The
Portugal  Property Fund, a Netherlands  Antilles  corporation,  or any
similar



























<PAGE>



investment fund (each such  investment  being referred to herein as an
"Investment"). Such appointment shall become effective with respect to
any Investment upon written  notification by the undersigned to Dillon
Read that the undersigned  wishes to accept such  Investment.  Without
limiting  the  foregoing,  Dillon  Read  shall  have  full  power  and
authority:  (A) to execute  and deliver or  otherwise  make for and on
behalf of the  undersigned  in such form as Dillon Read may, from time
to  time,   approve,   (i)  a  purchase  agreement  relating  to  each
Investment,  (ii) any  amendments  to or  waivers  regarding  any such
purchase agreement,  and (iii) any other agreements or certificates in
connection  with such  Investment;  (B) to vote or otherwise  act with
respect  to any  securities  acquired  in an  Investment  in its  sole
discretion;  and (C) to dispose, on behalf of the undersigned,  at any
time or from  time to time,  of all or any  specified  portion  of any
Investment,  without any prior notification to the undersigned, and in
connection  therewith to execute and deliver or otherwise  make for or
on behalf of the  undersigned in such form as Dillon Read may approve,
and at such  time and under  such  circumstances  as  Dillon  Read may
decide,  (i) a sales agreement  relating to such Investment,  and (ii)
any other  agreements or  certificates  in connection with the sale of
such  Investment;  in each  case,  unless  and until  the  undersigned
becomes the record  holder of such  securities,  and Dillon Read shall
have the sole and  exclusive  authority to determine  when to transfer
the






























<PAGE>




record  ownership of an Investment to the  undersigned  (in which case
this power of attorney (other than the next two succeeding paragraphs)
shall cease with respect to such Investment).

          Dillon  Read's  approval  of the  form  of any  document  or
certificate shall be conclusively evidenced by Dillon Read's execution
thereof.

          The  undersigned  hereby ratifies and confirms all that said
agent and  attorney-in-fact  may do by virtue hereof.  The undersigned
also hereby  ratifies,  confirms and adopts all actions taken prior to
this date by Dillon  Read on the  undersigned's  behalf in  connection
with any  Investment in which the  undersigned  has  participated  and
hereby irrevocably releases Dillon Read and any of its affiliates from
any present or future claims,  losses or liability in connection  with
the power of attorney  granted  hereby,  any  Investment or any act or
omission by Dillon Read in connection therewith.

          This  appointment  shall be irrevocable  with respect to any
Investment  once the purchase  agreement for such  Investment has been
executed and delivered on behalf of the undersigned pursuant hereto or
otherwise.

































<PAGE>




          This power of attorney  and any action  taken  hereunder  by
Dillon  Read  shall  not be  affected  by the  subsequent  disability,
incompetence  or death of the undersigned and any such action shall be
binding upon the heirs,  executors,  legal representatives and assigns
of the undersigned.



- ------------------------           -----------------------------
(Date)                             (Signature)




- ------------------------           -----------------------------
(Place of Execution)               (Print Name)













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