Indian Standards Institution <br/><br/>
Indian standard electrotechnical vocabulary part XXXIII piezo-electric filters  electrotechnical standards sectional committee, ETDC 1 

 - Indian Standards Institution, New Delhi  1972 
 - 8 
<br/><br/><label>Dewey Class. No.: </label>IS:1885(pt.XXXIII)-1972 621.3815324 I.S.I.