Mason, C. Russell. <br/><br/>
The art and science of protective relaying / 

 - New York :  John Wiley & Sons, Inc.,  1967. 
 - xiv, 410 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>NA 
<br/><br/><label>LC Class. No.: </label>D566 
<br/><br/><label>Dewey Class. No.: </label>621.311  / MAS