TY  - BOOK
AU  - Freeman, Roger L.
TI  - Telecommunication System Engineering
SN  - 0-471-13302-7
U1  - 621.382 
PY  - 1989///
CY  - New York
PB  - John Wiley & Sons
KW  - Engineering
KW  - Background and Concept ,  Simple Telephone Connection
ER  -