TY  - BOOK
AU  - Helfrick, A. D. 
AU  - Cooper, W. D. 
TI  - Modern Electronic Instrumentation & Measurement Techniques 
U1  - 621.38154 HEL  
PY  - 1994///
CY  - New Delhi
PB  - Prentice Hall Publication
KW  - Electronic Instrumentation
ER  -