Bureau of Indian Standard <br/><br/>
IS : 2933 1975 

 - 1st 
 - New Delhi  Bureau of Indian Standard  1975 
 - 16 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical Engineering
<br/><br/><label>Dewey Class. No.: </label>621.3  / BU-I