[GreenKeys] 1960 Army, Navy, and Commercial Communications Systems

[Nick England]

 1960 Army, Navy, and Commercial Communications Systems
(including AT&T, WU, cable companies, etc.)
USAF manual AFM 100-33
Some interesting history and overview, including maps
https://www.navy-radio.com/manuals/afm100-33-comm-systems.pdf

Nick England K4NYW
Chapel Hill NC
www.navy-radio.com
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