Telephony & telegraphy A
Subtitle: an introduction to telephone and telegraph instruments and exchanges
By: by Sydney F. Smith.
Publisher: Oxford U.P.
Published: 1969
Place of publication: London
Language: eng
Number of pages: 285
Subjects: Telephone.; Telegraph.
Notes: Bibliography: p. [263]
Third ed. published in 1978 under title: Telephony and telegraphy.