@book{vanrijsbergen79,
	title = {Information Retrieval},
	address = {London},
	author = {C.J. Van Rijsbergen},
	publisher = {Butterworths},
	year = {1979},
	biburl = {http://www.bibsonomy.org/bibtex/23034dcf5d8976f719f3cf4c9e553879d/bsmyth},
	keywords = {imported }
}