Telephony and telegraphy
Subtitle: an introduction to instruments and switching systems (electromechanical and reed-electronic)
By: by Sydney F. Smith.
Edition: 3d ed.
Publisher: Oxford University Press
Published: 1978
Place of publication: Oxford; New York
Language: eng
Number of pages: 278
Subjects: Telephone.; Telegraph.
Notes: First ed. published in 1969 under title: Telephony & telegraphy A.
Includes index.