Theraja, B. L. Theraja, A. K. <br/><br/>
A Textbook of Electrical Technology Vol-1 

 - New Delhi  S. Chand & Company  2001 
 - p.733 
<br/><br/><label>ISBN: </label>8121902908 
<br/><br/><label>Dewey Class. No.: </label>621.3 T31E