TY  - BOOK
AU  - Ziemer, Rodger, F and tranter, William, H 
TI  - Principles of communication systems modulation and noise 
SN  - 81-265-0839-6 
U1  - 621.382 ZIE  
PY  - 2006///
CY  - John wiely and sons, Inc. 
PB  - New Delhi 
KW  - COMMUNICATION SYSTEM
ER  -