Sonde/ B.S./ Aggarwal/ D.k.  <br/><br/>
Power suppliers 

 - New Delhi  Tata Mc Graw hill  1981 
 - 172 
 -  5 .
<br/><br/><br/>ENGLISH 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Power
<br/><br/><label>Dewey Class. No.: </label>621.31