Bureau of Indian Standard <br/><br/>
ETD16-Transformers IEC/TC 14 / 

 - Breau of Indian Standard  c621.314 
 - ill. ;  20*30 cm. 
 -  Vol.1, Vol.2 , Vol. 3 .
<br/><br/><label>LC Class. No.: </label>7482-7484 
<br/><br/><label>Dewey Class. No.: </label>621.314