Gray,Alexander Wallace,G.A. <br/><br/>
Principles and Practiceof  Electrical Engineering 

 - 8th Ed. 
 - Newyork  McGraw Hill  1962 
 - p.599 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric Circuits<br/>Polyphase- motor Applications
<br/><br/><label>Dewey Class. No.: </label>621.3 G778P