Heumann, Gerhart W. <br/><br/>
Magnetic control of industrial motors /  
Gerhart W. Heumann 
 - New York, London :   Wiley,   1947,1961 
 - 3 v :   il. 
 - General electric series .
<br/><br/>Tomo I: Alternating-current, control devices and assemblies - Tomo II: Alternating-current, motor controllers -Tomo III: Direct current, motor controllers. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MOTORES ELECTRICOS<br/>CONTROL DE MOTORES
<br/><br/><label>Universal Decimal Class. No.: </label>621.313