TY  - GEN
AU  - Roddy, Dennis
AU  - Coolen, John
TI  - Electronic communications/4th ed
SN  - 81-203-0984-7
PY  - 2013///
CY  - New Delhi
PB  - Prentice Hall of India
KW  - 621.39
KW  - Telecommunication
ER  -