Bird, Steven  Ewan Klein  Edward Loper <br/><br/>
Natural language processing with python 

 - Sebastopol  O'Reilly Media, Inc.  2009 
 - xx, 479 p.  : ill.  ; 24 cm 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780596516499 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer program language<br/>Computer science--Natural language processing--Program development--Tokenizing text--Raw text--GGC--FC
<br/><br/><label>Dewey Class. No.: </label>005.133  / BIR