Telephones

Reference / Paper · 1970

Telephone Communication Systems (1970), Vol 1 Ch. 4: Step-by-Step

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Textbook chapter explaining step-by-step systems.

Author
(textbook)
Year
1970
Type
Reference / Paper
Credit
Telephone Collectors International (TCI) Library, telephonecollectors.info (retrieved via Internet Archive Wayback Machine)

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Telephone Communication Systems (1970), Vol 1 Ch. 4: Step-by-Step