Telephony and telegraphy : an introduction to instruments and switching systems (electromechanical and reed-electronic) /
Smith, Sydney F.
Telephony and telegraphy : an introduction to instruments and switching systems (electromechanical and reed-electronic) / by Sydney F. Smith. - 3d ed. - Oxford ; New York : Oxford University Press, c1978. - xiv, 278 p. : ill. ; 26 cm.
First ed. published in 1969 under title: Telephony & telegraphy A. Includes index.
0198593589 0198593570 (pbk)
Telephone.
Telegraph.
621.3841 / SMT 1978
Telephony and telegraphy : an introduction to instruments and switching systems (electromechanical and reed-electronic) / by Sydney F. Smith. - 3d ed. - Oxford ; New York : Oxford University Press, c1978. - xiv, 278 p. : ill. ; 26 cm.
First ed. published in 1969 under title: Telephony & telegraphy A. Includes index.
0198593589 0198593570 (pbk)
Telephone.
Telegraph.
621.3841 / SMT 1978