Beckman Instruments, Inc 1990 Rotors, Tubes & Accessories Catalog.

Neslab Instruments, Inc. 1990/91 Recirculating Chillers Catalog.

BK Precision / Maxtec 1990 Test Instruments Catalog.

Nikon Inc. Instrument Group January 1990 Instruments for Industry Catalog.

Sensitive Research catalog #62 Electrical Measuring Instruments Permanently Prec

Schlumberger Technologies 1990 Instruments Catalog.

Millivac Instruments, Inc. - 1965 Condensed Catalog And Price List

Weston Instruments Inc. 1962 Catalog.