Bull, Hempstead S. <br/><br/>
Direct-Current Machinery 

 - 4th ed. 
 - New York  Wiley  1947 
 - vi, 318 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric Machinery
<br/><br/><label>Dewey Class. No.: </label>621.3132  / B9351