Blackburn, J. Lewis   <br/><br/>
Protective relaying: principles and applications 
by J. Lewis Blackburn 
 - 4th ed. 
 - Boca R  CRC Press  2018 
 - xx, 665p. 
<br/><br/><label>ISBN: </label>9781138569522 
<br/><br/><label>Dewey Class. No.: </label>621.317  / P18(EE)