Lancaster, F. Wilfrid  . <br/><br/>
Information retrieval systems : characteristics, testing and evaluation /  
F. Wilfrid Lancaster. 
 - New York :   John Wiley ,   1991. 
 - 381p. :   Table and figures ;   29cm .  
<br/><br/>Includes appendix, bibliography & index 
<br/><br/><label>ISBN: </label> NULL (hbk) 
<br/><br/><label>Subjects--Index Terms: </label>INFORMATION RETRIEVAL  
<br/><br/><label>Dewey Class. No.: </label>025.04  / LAN/I