TY  - BOOK
AU  - ISRD Group 
TI  - Data communication and computer networks 
SN  - 0-07-061682-5 
U1  - 005.71 ISR  
PY  - 2007///
CY  - Tata mcgraw hill company Ltd 
PB  - New Delhi 
KW  - DATA COMMUNICATION
ER  -