Dhawan, K.S.  . <br/><br/>
Principles of information retrieval /  
by K.S Dhawan. 
 - New Delhi :   Commonwealth publishers ,   1997 
 - 275p :  
<br/><br/><label>ISBN: </label>81-7169-484-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library- Information Retrieval
<br/><br/><label>Dewey Class. No.: </label>2:(BV)  / N7;1