TY  - BOOK
AU  - Roddy,Dennis
AU  - Coolen John
TI  - Electronic communications
SN  - 9788177585582
AV  - TK5101 .R631995
PY  - 1995///
CY  - New Delhi
PB  - Prentice Hall
KW  - Telecommunication
N1  - Includes index
ER  -