TY  - BOOK
AU  - Gupta, R.G 
TI  - Electronic instruments and systems: principles mentenance an 
SN  - 0-07-463629-4 
U1  - 621.37 GUP  
PY  - 2001///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - INSTRUMENT AND MEASURMENTATION
ER  -