TY  - BOOK
AU  - Garcia, Aleberto Leon 
TI  - Communication networks : fundamentals concepts and key archi 
SN  - 0-07-040235-3 
U1  - 004.65 GRA  
PY  - 2000///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - COMPUTER NETWORK
ER  -