TY  - BOOK
AU  - Halsall Fred
TI  - Data communications, computer networks and open systems
SN  - 981-233-892-7
U1  - 621.3819594 
PY  - 1999///
CY  - Harlow
PB  - Addison-Wesley
KW  - Computer networks
KW  - Data communications
KW  - Electrical engineering
ER  -