TY  - BOOK
AU  - Helfrick, Albert D  .
AU  - Cooper, William D  .
TI  - Modern Electronic Instrumentation and Measurement Techniques 
SN  - 81  203  0752  6
U1  - 621.371 
PY  - 2014///
CY  - New Delhi : 
PB  - Prentice Hall of India Pvt Ltd. , 
ER  -