Indian Standards Institution <br/><br/>
Indian standard specification for rotary wafer switches (low current rating) part I tests and general requirements  electronic components sectional committee, ETDC 25 

 - Indian Standards Institution, New Delhi  1964 
 - 20 
<br/><br/><label>Dewey Class. No.: </label>IS:2628(pt.I)-1964 621.317 I.S.I.