Bureau of Indian Standard <br/><br/>
IS : 325 1978 

 - 1st 
 - New Delhi  Bureau of Indian Standard  1978 
 - 33 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical Engineering
<br/><br/><label>Dewey Class. No.: </label>621  / BU-I