TY  - BOOK
AU  - SHAY, WILLIAM A
TI  - UNDERSTANDING DATA COMMUNICATIONS AND NETWORKS 
SN  - 0-534-38317-3
U1  - 004.6 21 O 04 SHA 
PY  - 2004///
CY  - NEW DELHI
PB  - THOMSON ASIA PVT. LTD.
ER  -