Nagrath, I J <br/><br/>
Electric Machines 

 - 2 ed. 
 - New Delhi  McGraw Hill   2002 
 - p.778 
<br/><br/><label>ISBN: </label>007463285X 
<br/><br/><label>Subjects--Topical Terms: </label> Motor Control  Magnetic Circuit  Polarity Test  Harmonics 
<br/><br/><label>Dewey Class. No.: </label>621.313 N13E