Unique Research Academy <br/><br/>
BSNL J.T.O. 
/Edited by Unique Research Academy 
 - New Delhi  Unique Publishers  2011 
 - 400p. 
<br/><br/><label>ISBN: </label>8183572014 
<br/><br/><label>Dewey Class. No.: </label>600  / URA/B