Pohl, R. W. <br/><br/>
Physical principles of electricity and magnetism / 
by R. w. pohl ; tranlated by Winifred M. Deans 
 - London :  Blackie & Son Limited,  1948 
 - xi, 356p.: ill 
<br/><br/><label>LC Class. No.: </label>QC 518.1