@book{139555,
	author = {Burlaeus, Gualterus, and Spade, Paul Vincent. and ebrary, Inc.},
	title = {On the purity of the art of logic},
	publisher = {Yale University Press,},
	year = {c2000.},
	series = {Yale library of medieval philosophy},
	address = {New Haven :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10170785}
}