Bell System Key System Service Manual Volume III July 1980

HP 59401-90000 1975 Model 59401A Bus System Analyzer Operating Manual.

1943 New England Bell System Safety Code Plant Dept Manual Standards Binder

Bruel & Kjaer Gating System type 4440 Instruction Manual 1975

White Instruments 4004 Service Manual 1975

1975 Tektronix Instruction Manual 5103N Oscilloscope System

HP Measuring System 5300B & Battery Pack 5310A Operating and Service Manual 1975

HP 5340A Frequency Counter Operating and Service Manual 05340-90021 Sept. 1975