TY  - GEN
AU  - Bellamy, John C.
TI  - Digital telephony/ 3rd ed
SN  - 9814126357
U1  - 621.395 BEL 
PY  - 2002///
CY  - New York
PB  - John Wiley
KW  - Telephony2309
KW  - 621.395
KW  - Digital Telephony
ER  -