Hughes, Edward. <br/><br/>
ELECTRICAL TECHNOLOGY. 

 - 5th Ed. 
 - London :  English language book society and Longman Group Limited,  1977. 
 - xviii, 710 p. 
<br/><br/><label>ISBN: </label>0582408016 
<br/><br/><label>Dewey Class. No.: </label>621.3  / HUG