Rijsbergen,van C.J <br/><br/>
The Geometry of Information retrieval 
by  C.J Rijsbergen 
 - Cambridge  Cambridge University Press  2007 
<br/><br/><label>ISBN: </label>9780521838054 
<br/><br/><label>Dewey Class. No.: </label>029.7 RIJ/GEO