Cours d'installations télégraphiques et téléphoniques / Léon Eyrolles
A.T.M. mine signalling handbook / A.T.M. Automatic Telephone & Electric Co. Ltd
Telephony : a detailed exposition of the telephone system of the British Post Office / T. E. Herbert; W. S. Procter
American Telephone Practice / Kempster B. Miller
The 1989 arrl handbook for the radio amateur / The American Radio Relay League
Telephones and telephony
The telephone handbook / Joseph Poole
Common battery telephony simplified
The application to radio telegraphy of the creed printing telegraph
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