TY  - BOOK
AU  - Held, Gilbert.
TI  - Understanding Data Communication [RES]
SN  - 81-7635-319-1
U1  - 004.6 
PY  - 1999///
CY  - New Delhi
PB  - Techmedia
KW  -  Data transmission systems.
KW  -  Computer networks.     COMPUTERS -- Networking -- Vendor Specific.
N1  - Includes index
ER  -