Basic carrier telephony
Talley, David
Basic carrier telephony - - New York John F. Rider Pub., 1960 - iii,170 p. 23 cm - .
4
Telephone, Carrier current
Telephone systems
621.395.44 Tal
Basic carrier telephony - - New York John F. Rider Pub., 1960 - iii,170 p. 23 cm - .
4
Telephone, Carrier current
Telephone systems
621.395.44 Tal