TY  - BOOK
AU  - Hill Associates, Inc. 
TI  - Telecommunications: abeginner's guide 
SN  - 0-07-049919-5 
U1  - 621.382 HIL  
PY  - 2002///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - COMMUNICATION SYSTEM
ER  -