@book{j:van,
	title = {Information Retrieval},
	address = {London},
	author = {C. J. van Rijsbergen},
	publisher = {Butterworths},
	year = {1975},
	biburl = {http://www.bibsonomy.org/bibtex/2819dccd1a9a5921352a5369154f880e9/nlp},
	keywords = {2000 book nlp }
}