Atkinson, J.
Telephony : a detailed exposition of the telephone exchange systems of the British post office : vol. 1, general principles and manual exchange systems / J. Atkinson. - London : Sir Isaac Pitman, 1948. - xii, 514 p. : ill. ; 25 cm.
Includes index.
Telephony
621.385 / ATT
Telephony : a detailed exposition of the telephone exchange systems of the British post office : vol. 1, general principles and manual exchange systems / J. Atkinson. - London : Sir Isaac Pitman, 1948. - xii, 514 p. : ill. ; 25 cm.
Includes index.
Telephony
621.385 / ATT