Indian Standards Institution <br/><br/>
Indian standard letter symbols for semiconductor devices part IV thyristors  semiconductor devices and integrated circuits sectional committee, ETDC 40 

 - Indian Standards Institution, New Delhi  1972 
 - 8 
<br/><br/><label>Dewey Class. No.: </label>IS:3715(pt.IV)-1971 621.38152 I.S.I.