Lancaster, F. Wilfrid  1933- <br/><br/>
Information retrieval systems :  characteristics, testing, and evaluation / 
F. Wilfrid Lancaster. 
 - New York :  John Wiley & Sons,  1968. 
 - xiv, 222 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471512400 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information storage and retrieval systems.