@book{183219,
	author = {Nowell, April, and ebrary, Inc.},
	title = {Stone tools and the evolution of human cognition},
	publisher = {University Press of Colorado,},
	year = {c2010.},
	address = {Boulder, Colo. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10408951}
}