Case, John. [from old catalog] <br/><br/>
The theory of direct-current dynamos and motors, 

 - Cambridge,  W. Heffer & sons, ltd.,  1921. 
 - 2 p.l., vii-xiii, 196 p.,  1 l. illus., 2 fold. pl., diagrs.  23 cm. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric generators--Direct current.<br/>Electric motors, Direct current.
<br/><br/><label>Dewey Class. No.: </label>621.3132  / CAS