Gebert, Kenneth L. Edwards, Kenneth R. <br/><br/>
Transformers :  principles and applications / 
by Kenneth L.Gebert, Kenneth R.Edwards 
 - 2nd ed. 
 - Illinois  American Technical pub.  1974 
 - 345 p. 
<br/><br/><label>ISBN: </label>826916023 
<br/><br/><label>Dewey Class. No.: </label>621.31  / GEB