NUVEEN TAX EXEMPT UNIT TRUST SERIES 686


333 W WACKER DRIVE, CHICAGO IL 60606


1996 SEC Filings

NUVEEN TAX EXEMPT UNIT TRUST SERIES 686, 24F-2NT, 1996-11-01
NUVEEN TAX EXEMPT UNIT TRUST SERIES 686, 485BPOS, 1996-08-22
NUVEEN TAX EXEMPT UNIT TRUST SERIES 686, 497, 1996-05-10


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