TY  - GEN
AU  - Halsall , Fred 
TI  - Data communications computer networks and open systems
SN  - 8178080982
U1  - 004.6 
PY  - 2003///
CY  - New Delhi
PB  - Pearson Education
KW  - DATA COMMUNICATION
KW  - COMPUTER COMMUNICATIONS NETWORKS
KW  - COMPUTER SCIENCE
ER  -