Telephony : a detailed exposition of the telephone exchange systems of the British Post Office /

Telephony : a detailed exposition of the telephone exchange systems of the British Post Office /

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Bibliographic Details
Main Authors: 407522 Atkinson, James, Herbert, Thomas Ernest, 1875-1943, Procter, William Skirrow
Format:
Published: London : Pitman, 1948
Subjects:
Telephone
Postal service

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