@book{3160,
	author = {Spinoza, Benedictus de, and ebrary, Inc.},
	title = {On the improvement of the understanding},
	publisher = {Project Gutenberg,},
	year = {2001.},
	address = {Champaign, IL :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=5001007}
}