TY  - BOOK
AU  - Couch , W. , Leon ,II 
TI  - Digital and analog Communication System 
SN  - 9788131725436
U1  - 621.382 
PY  - 2009///
CY  - New Delhi
PB  - Dorling  Kindersley, 
KW  - Telecommunication systems
KW  - Digital communications
ER  -