TY  - GEN
AU  - Sapre, S D
AU  - Singh, R P
TI  - Communication systems: analog and digital
SN  - 0074603396
U1  - 621.382 
PY  - 2000///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Communication
KW  - communication Engineering
ER  -