Nagrath, I J &  Kothari,D P <br/><br/>
Electric machines 

 - 2nd ed 
 - Tata Mcgraw-Hill, New Delhi  1997 
 - xxii,778 
<br/><br/><label>ISBN: </label>0-07-463285-X 
<br/><br/><label>Dewey Class. No.: </label>621.31042 Nag/Kot