TY  - BOOK
AU  - Roddy,Dennis
AU  - Coolen,John
TI  - Electronic communications
SN  - 0835916316
PY  - 1981///
CY  - Reston, Va.
PB  - Reston Pub. Co.
KW  - Telecommunication
KW  - Electronics
N1  - Includes index
ER  -