RAO,T.S.M <br/><br/>
DIGITAL /NUMARICAL RELAYS 

 - NEW DELHI  Tata McGraw-Hill  2005 
 - xii+227p.,24X16Cms. 
<br/><br/><label>ISBN: </label>0070588554 
<br/><br/><label>Dewey Class. No.: </label>621.317 R215