Bird, Steven. <br/><br/>
Natural language processing with Python :  analyzing text with the natural language toolkit / 

 - Mumbai :  Shroff Publishers & Distributors,  9th Indian reprint 2019. 
 - xx, 479 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9788184047486 
<br/><br/><label>LC Class. No.: </label>23817-23821 
<br/><br/><label>Dewey Class. No.: </label>005.133  / BIR