CUSIP No. 910741107 SCHEDULE 13D Page 14 of 14 Pages
Exhibit 1
Amended Joint Filing Agreement
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934,
as amended, the persons named below agree to the joint filing on behalf of each
of them of the Schedule 13D (and further amendment filed by them) with respect
to the Common Shares (as defined in the Schedule 13D filed with the Securities
and Exchange Commission on August 15, 2000).
Southwest Securities, Inc.
By: /s/ David Glatstein
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David Glatstein, President and CEO
/s/ David Glatstein
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David Glatstein, Individually
Jerome N. Glatstein Trust
By: /s/ David Glatstein
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David Glatstein, Trustee
Fiduciary Financial Services
of the Southwest, Inc.
By: /s/ Paul H. Welch
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Paul H. Welch, President
EQSF Advisers, Inc.
By: W. James Hall
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W. James Hall, Secretary
M.J. Whitman Advisers, Inc.
By: W. James Hall
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W. James Hall, Secretary
Dated: August 25, 2000
