@book{39536,
	author = {Francis, Roy G., and ebrary, Inc.},
	title = {The population ahead},
	publisher = {University of Minnesota Press,},
	year = {[1958]},
	address = {Minneapolis :},
	note = {Based on papers presented at the second symposium on population problems, held at the University of Minnesota in 1957.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10231138}
}