TY  - BOOK
AU  - John C Bellamy
TI  - Digital Telephony,Ed3
SN  - 0000061782
U1  - 621.385 
PY  - 2008///
CY  - New Delhi
PB  - John wiely
KW  -  Telephony,Ed3
KW  - Digital
KW  - Telephony(621.385)
ER  -