@book{4012,
	author = {Ellen, R. F.,},
	title = {Environment, subsistence, and system :},
	publisher = {Cambridge University Press,},
	year = {1982.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/cam022/81018035.html}
}