TY  - GEN
AU  - Held, Gilbert
TI  - Data communications networking devices: operation, utilization, and LAN and WAN internetworking 
SN  - 9780471975151 (hbk)
U1  - 004.6 
PY  - 1999///
CY  - Chichester
PB  - Wiley, 
KW  - Data transmission systems
N1  - Includes index
ER  -