Warrington, A. R. Van C. <br/><br/>
Protective Relays: Their Theory And Practice Vol-I 

 - 2nd. 
 -     
 - 484. 
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/><br/>
<br/><br/><label>Dewey Class. No.: </label>621.317 WAR  / WAR