Smith, Sydney F.
Telephony and telegraphy an introduction to instruments and switching systems (electromechanical and reed-electronic) - 3rd ed. - New York Oxford University Press 1978 - xiv,278p. ill. 26 cm.
0198593570
Telephony engineering
623.85 / SMI/1978
Telephony and telegraphy an introduction to instruments and switching systems (electromechanical and reed-electronic) - 3rd ed. - New York Oxford University Press 1978 - xiv,278p. ill. 26 cm.
0198593570
Telephony engineering
623.85 / SMI/1978