Ellis David. <br/><br/>
Progress and problems in information retrieval 

 - London  Library Association        1996 
 - xx,220p  cm. 
<br/><br/><label>Standard No.: </label>5,380 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2:7, N6