TY  - BOOK
AU  - Horak, Ray
TI  - Communications systems and networks: voice,data & broadband technologies 
SN  - 1558514856
AV  - TK5101 .H665 1996 
PY  - 1996///
CY  - New York
PB  - M & T books
KW  - Computer networks
N1  - Includes index
ER  -