TY  - BOOK
AU  - Held,Gil
TI  - Voice & Data: Internetworking
SN  - 0072131837
U1  - 621.385 
PY  - 2001///
CY  - New York
PB  - McGraw-Hill
KW  - Digital telephone systems
KW  - Local
KW  - Computer networks
N1  - Includes index
ER  -