Heafford, Philip Ernest. <br/><br/>
Electric currents. 

 - General ed. / Charles H. Dobinson.  General ed. / Charles H. Dobinson. 
 - [London] :  Longmans [Green,  1965] 
 - Science on the march ;  unit 8 .
<br/><br/> First published in 1956. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric currents.