Folder WEco Telephone Communication Systems
Multiple editions contain similar chapters.
1966: Communication Systems, Revised Edition.
1969: Fundamentals of Telephone Communication Systems, Revised.
1970: Telephone Communication Systems, Revised Edition, Issue 2, in 5 volumes
- V1: Early Systems and Station Equipment, V2: Crossbar, V3: ESS, V4: Long Distance, V5: OSP & Test
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