Kochen, Manfred <br/><br/>
Principles of information retrieval  / 

 - Los Angeles:  Melville,  1974 
 - xx, 203p. 
 - Information science series .
<br/><br/> "A Wiley-Becker and Hayes series book" 
<br/><br/><label>Dewey Class. No.: </label>029.7  / K76.PI