TY  - BOOK
AU  - Indian Standards Institution
TI  - Indian standard guide for the use of quartz crystal units for frequency control and selection: piezoelectric devices for frequency control and selection sectional committee, LTDC 12
U1  - IS:2935-1980 548.85 I.S.I. 
PY  - 1981///
CY  - Indian Standards Institution, New Delhi
ER  -