Van Rijsbergen, C. J. <br/><br/>
Information retrieval 
C. J. van Rijsbergen. 
 - 2d ed. 
 - London  Boston  Butterworths  1979. 
 - ix, 208 p.  ill.  23 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p [192]-204. 
<br/><br/><label>ISBN: </label>0408709294  £11.95 
<br/><br/><label>LCCN: </label>78040725  
<br/><br/><label>Nat. Bib. No.: </label>GB79 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information storage and retrieval systems
<br/><br/><label>LC Class. No.: </label>Z699  / .V35 1979 
<br/><br/><label>Dewey Class. No.: </label>029.7