TY  - BOOK
AU  - Halsall,Fred
TI  - Data communications, computer networks, and open systems
SN  - 020142293X
U1  - 004.6  23
PY  - 1996///
CY  - Workingham, England : 
PB  - Addison-Wesley , 
KW  - Data transmission systems ; Computer networks
ER  -