Electrical machines : Direct and alternating current 
Siskind, Charles. 
 - Second edition. 
 -  McGraw-Hill Book Company.  1979 
 - 563 pages. 
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<br/><br/><label>ISBN: </label>9-71081521-0 
<br/><br/><label>Dewey Class. No.: </label>621.4 Si8e 1979