TY  - BOOK
AU  - Roddy, Dennis, author.
AU  - Coolen, John, author.
TI  - Electronic communications
SN  - 0-13-312083-x
U1  - DC 621.382 1995
PY  - 1995///
CY  - Englewood Cliffs, New Jersey
PB  - Prentice Hall
KW  - Telecommunications
N1  - Includes index
ER  -