TY  - BOOK
AU  - Shanmugam, Sam, K 
TI  - Digital and analog communication systems 
SN  - 81-365-0914-7 
U1  - 621.382 SHA  
PY  - 2007///
CY  - John wiley and sons 
PB  - New York 
KW  - COMMUNICATION SYSTEM
ER  -