Langsdorf, Alexander S. <br/><br/>
Principles of direct-current machines / 
Alexander S. Langsdorf 
 - 6th ed. 
 - New York :  McGraw-Hill Book Company,  1959 
<br/><br/>Includes appendices ; bibliograhy ; glossary & index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Direct-current Machines
<br/><br/><label>Dewey Class. No.: </label>621.3132  / LAN