TY  - BOOK
AU  - Halsall,Fred
TI  - Data communications, computer networks and OSI
SN  - 0201182440
U1  - TK/5105.5 
PY  - 1988///
KW  - Computer network protocols.
KW  - Computer networks.
KW  - Data transmission systems.
KW  - Local area networks (Computer networks).
ER  -