TY  - GEN
AU  - Halsall,Fred
TI  - Data communications computer networks and open systems 
SN  - 8178080982
U1  - 004.6 
PY  - 1996///
CY  - Delhi
PB  - Pearson Education
KW  - Data transmission systems
KW  - Computer networks
KW  - Local area networks (Computer networks)
KW  - Computer network protocols
ER  -