TY  - BOOK
AU  - BATES, REGIS J.
AU  - GREGORY, DONALD W.
TI  - VOICE AND DATA COMMUNICATIONS HANDBOOK
SN  - 0070472815
U1  - 621.399/BAT/GRE 
PY  - 2004///
CY  - NEW DELHI.
PB  - TATA MCGRAW HILL CO LTD., NEW DELHI.
ER  -