Van. A.R. <br/><br/>
Protective relays  their theory and practice. 
R Van 
 - 3rd ED 
 - London  Chapman & Hall 1977 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protective Relays.
<br/><br/><label>LC Class. No.: </label>TK 2861 .W37 1977