1957

3A StereoDisk Recorder and RA-1574-B Amplifier

Technical Information Bulletin
Operating and Maintenance Instructions
Westrex Corporation (Hollywood Division), December 20, 1957

1958

The Westrex StereoDisk System

Documenting the Westrex 3A Cutting Head
Proceedings of the IRE, October 1958
C.C. Davis and J.G. Frayne

1959

Recent Developments in Stereo Disk Recording

Documenting improvements made to the Westrex stereo cutting head, resulting in new model 3C
Journal of the AES, February 1959
John G. Frayne and R.R. Davis

1964

The Westrex 3D StereoDisk System

Introducing the significantly redesigned Westrex 3D stereo cutting head and accompanying amplifiers…
Journal of the AES, March 1964
C. S. Nelson and and J. W. Stafford