TY  - BOOK
AU  - Leon - Garcia  A,
AU  - Widiajia I,
TI  - Communication Networks Fundamental Concepts and Key Architecture 
SN  - 0070595011
U1  - 621.3821 
PY  - 2006///
CY  - Noida
PB  - Tata Mc Graw Hill Education  Pvt.  Ltd.
ER  -