INDUSTRIAL ACOUSTICS CO INC

Q: Jun 30 1998

Q: Mar 31 1998

Q: Mar 31 1998

FY: Dec 31 1997

FY: Dec 31 1997

Q: Sep 30 1997

Q: Sep 30 1997

Q: Jun 30 1997

Q: Mar 31 1997

FY: Dec 31 1996

Q: Nov 14 1996

Q: Aug 29 1996

Current report pursuant to Section 13 or 15(d)

Certification of termination of registration of a class of securities (Section 12(g))

Definitive Proxy Statement

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Definitive Proxy Statement

BABSON DAVID L & CO INC

INDUSTRIAL ACOUSTICS CO INC

IAC HOLDINGS CORP

INTERNATIONAL MEZZANINE INVESTMENT N V

BABSON DAVID L & CO INC

BABSON DAVID L & CO INC