Kloeffler, Royce Gerald.  <br/><br/>
Direct-current machinery 

 - New York :   Macmillan,   1949. 
 - 395 p. : il. ; 24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MOTORES DE CORRIENTE CONTINUA
<br/><br/><label>Universal Decimal Class. No.: </label>621.313