Edwards, J. D. <br/><br/>
Electrical machines and drives :  an introduction to principles and characteristies / 
J. D. Edwards 
 - London :  Macmillan Education,  1991 
 - 249 p. :  ill. ;  24 cm. 
 - Intertext books .
<br/><br/>p. (240-241) 
<br/><br/><label>ISBN: </label>0333536509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric machinery