@book{12340,
	author = {Williamson, Timothy. and ebrary, Inc.},
	title = {Vagueness},
	publisher = {Routledge,},
	year = {1996.},
	series = {Problems of philosophy},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10017819}
}