@book{149143,
	author = {Perkins, Jacob. and ebrary, Inc.},
	title = {Python text processing with NLTK 2.0 cookbook},
	publisher = {Packt Pub.,},
	year = {2010.},
	address = {Birmingham, U.K. :},
	note = {Includes index.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10435387}
}