TY  - BOOK
AU  - Couch, Leon, W 
TI  - Digital and analog communication systems 
SN  - 978-81-203-3411-3 
U1  - 621.382 COU  
PY  - 2007///
CY  - Pearson education asia 
PB  - Delhi 
KW  - COMMUNICATION SYSTEM
ER  -