Barr, James Robertson. [from old catalog] <br/><br/>
Principles of direct-current electrical engineering, 

 - 3rd ed. 
 - London,  I. Pitman,  1943. 
 - x, 486 p.  illus.  22 cm. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric machinery--Direct current. [from old catalog]<br/>Electrical engineering.<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>621.31912  / BAR