@book{196771,
	author = {Keefe, Rosanna. and ebrary, Inc.},
	title = {Theories of vagueness},
	publisher = {Cambridge University Press,},
	year = {2000.},
	series = {Cambridge studies in philosophy},
	address = {Cambridge, UK ;},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=2000831}
}