Power system protection 
edited by the Electricity Council 
 - 2nd ed. 
 - Stevenage, U.K.  Peter Peregrinus  1981 
 - 3V. : ill. 
<br/><br/><label>ISBN: </label>0906048478 
<br/><br/><label>LC Class. No.: </label>TK 3226 Pow