TY  - BOOK
AU  -  Helfrick, D Albert &  Cooper,  D  William
TI  - Modern electronic instrumentation and measurement techniques
SN  - 81-203-0752-6
U1  - 621.37 Hel/Coo 
PY  - 1998///
CY  - Prentice-Hall of India, New Delhi
ER  -