TY  - BOOK
AU  - Singh, R. P.
AU  - Sapre, S. D.
TI  - Communication systems: analog and digital 
SN  - 9781259004605
AV  - 20993-20997 
U1  - 621.382 22
PY  - 2012///
CY  - New Delhi
PB  - McGraw Hill Education (India) Pvt. Ltd.
N1  - Includes index
ER  -