pdf BTL X-63940 Apr60 - The Electronic Switching System Popular
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BTL_X-63940_Apr60_The_Electronic_Switching_System_Lovell_tci_ocr.pdf
11MB. 365 pages. Preface by C. L. Lovell, Bell Labs, PRIVATE EDITION, Morris, IL Electronic Central Office, Trial Installation. Contributed by Astrid Smith, Connections Museum. Missing page supplied by Steph Kerman and integrated by Karl Brose.
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