Lancaster, F. Wilfrid  1933- <br/><br/>
Information retrieval systems :  characteristics, testing, and evaluation / 
F. Wilfrid Lancaster. 
 - 2d ed. 
 - New York :  Wiley,  1979. 
 - xviii, 381 p. :  ill. ;  24 cm. 
 - Information sciences series. .
<br/><br/> 'A Wiley-Interscience publication.'  Includes index. 
<br/><br/>Bibliography: p. 359-373. 
<br/><br/><label>ISBN: </label>0471046736 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information storage and retrieval systems.