TY  - BOOK
AU  -  Roddy, Dennis
TI  - ELECTRONIC COMMUNICATIONS
SN  - 9788120309845
U1  - 621.382 ROD-E 
PY  - 2009///
CY  - New Delhi
PB  - PHI Pub.
KW  - ELECTRONIC COMMUNICATIONS
UR  - https://books.google.co.in/books?id=Q97tDDacYkUC&printsec=frontcover&dq=electronic+Communications+by+roddy&hl=en&sa=X&ved=0ahUKEwjy4Iui4LjhAhUChuYKHShXCiEQ6AEIKDAA#v=onepage&q=electronic%20Communications%20by%20roddy&f=false
ER  -