TY  - BOOK
AU  - Helfrick , Albert D.
TI  - Modern electronic instrumentation and measurement techniques
SN  - 8120307526
U1  - D65e:b6 LO,N0;1 
PY  - 2000///
CY  - New Delhi
PB  - Prentice-Hall of India Private Limited
N1  - includes index
ER  -