TY  - BOOK
AU  - Bird, Steven
AU  - Klein, Ewan
AU  - Loper, Edward
TI  - Natural Language Processing with Python 
SN  - 9780596516499
U1  - 006.32 
PY  - 2009///
CY  - Beijing : 
PB  - O'Reilly, 
KW  - Computer Program Language
KW  - Natural language processing Computer science
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/978-0-596-51649-9.pdf
ER  -