TY  - GEN
AU  - Halsall ,  Fred
TI  - Data communications computer networks and open systems
SN  - 0201565064
U1  - 004.6 
PY  - 1992///
CY  - Wokingham
PB  - Addison-Wesley 
KW  - COMPUTER SCIENCE
KW  - COMPUTER COMMUNICATION
KW  - COMPUTER NETWORKS
ER  -