TY  - BOOK
AU  - Hughes,Larry
TI  - Introduction to data communications: a practical approach 
SN  - 8173191794
U1  - 004.6 20
PY  - 1997///.[Reprinted 1999]
CY  - New Delhi.
PB  - Narosa Pub.
KW  - Data transmission systems
N1  - Includes index
ER  -