Introduction to information retrieval 
Manning, Christopher D. 
 -  Cambridge University Press,  2009 
 - xxi, 482 p. 
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<br/><br/><label>ISBN: </label>0-521-86571-9 (hardback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Document clustering.
<br/><br/><label>Dewey Class. No.: </label>025.5 M283 2009