Barr, James R. <br/><br/>
Principles of direct current electrical engineering / 
by  James R. Barr and  D. J. Bolton 
 - 2nd ed. 
 - London :  Sir Isaac Pitman and Sons,   1960. 
<br/><br/><label>Subjects--Index Terms: </label>Electrical Engineering 
<br/><br/><label>Dewey Class. No.: </label>621.3132