TY  - BOOK
AU  - Talley,David
TI  - Basic telephone switching systems
SN  - 0810456877 :
AV  - TK6397 .T34 1979
U1  - 621.3857 
PY  - 1980///
CY  - Rochelle Park, N.J.
PB  - Hayden Book Co., D. B. Taraporevala Sons and Co.
KW  - Telephone systems
KW  - Telephone, Automatic
N1  - Includes index; Printed in India
ER  -