BK Precision / Maxtec 1990 Test Instruments Catalog.

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

Neslab Instruments, Inc 1990 Catalog.

CVI Laser Corportation 1990 Optics Catalog

Anritsu Electronic Measuring Instruments 1990 Catalog

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

Marconi Instruments 1989/1990 Instruments Catalog

Sensitive Research catalog #62 Electrical Measuring Instruments Permanently Prec