@book{57073,
	author = {Quine, W. V. and ebrary, Inc.},
	title = {Set theory and its logic},
	publisher = {Belknap Press of Harvard University Press,},
	year = {[1969]},
	address = {Cambridge :},
	edition = {Rev. ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10314191}
}