TY  - BOOK
AU  - Held, Gilbert
AU  - 
TI  - Understanding data communications from fundamentals to networking
SN  - 0-471-62745-3
U1  - 621.391:004.77 
PY  - 2000///
CY  - Chichester
PB  - John Wiley & Sons
KW  - Data communication
KW  - Data transmission systems
KW  - Computer network
KW  - Computer networks
KW  - Data networks, computer
KW  - Internet- computer network
KW  - Electronic data processing
KW  - Telecommunication
ER  -