Baeza Ricardo Yates  Berthier Ribiero Neto <br/><br/>
Modern Information Retrieval 

 - 1 
 - New Delhi  Pearson  1999 
 - 512 
<br/><br/><label>ISBN: </label>978-81-317-0977-1 
<br/><br/><label>Dewey Class. No.: </label>004 N99 BAE