Blackburn, J Lewis <br/><br/>
Protective Relaying 
J LewisBlackburn 
 - 3rd 
 - Boca Raton  CRC Press  2007 
 - 633p 
<br/><br/><label>ISBN: </label>1574447165 
<br/><br/><label>Dewey Class. No.: </label>621.317  / BL-P