TY  - GEN
AU  - Bates Rejis J
AU  - Gregory Donald W.
TI  - Voice and data communications handbook
SN  - 0070472815
U1  - 005.71 
PY  - 2001///
CY  - New Delhi
PB  - Tata McGraw Hill
KW  - Data Communi cations
KW  - Data Communications
KW  - Data in Computer Systems
ER  -