TY  - BOOK
AU  - SINGH, R.P.
AU  - SAPRE, S.D.
TI  - COMMUNICATION SYSTEMS ANALOG AND DIGITAL
SN  - 0074603396
U1  - 621.382/SIN/SAP 
PY  - 2003///
CY  - NEW DELHI.
PB  - TATA MCGRAW HILL CO LTD., NEW DELHI.
ER  -