TY  - BOOK
AU  - Helfrick, A. D.
AU  - Cooper, W. D.
TI  - Modern Electronics Instrumentation & measurement techniques
SN  - 9788120307520
U1  - 621.3814 
PY  - 1990///
CY  - New Delhi
PB  - Prentice Hall of India
KW  - EEE
KW  - Modern Electronic
N1  - 445
ER  -