Atkinson, J.
Telephony a detailed exposition of the telephone exchange systems of the britich post office - 1st ed. - London SIR Isaac Pitman & Sons 1948 - xii, 514 p. ill.
Vol. I (general principles and manual exchange systems)
Telephony : Engineering
623.85 / ATK/1948
Telephony a detailed exposition of the telephone exchange systems of the britich post office - 1st ed. - London SIR Isaac Pitman & Sons 1948 - xii, 514 p. ill.
Vol. I (general principles and manual exchange systems)
Telephony : Engineering
623.85 / ATK/1948