@book{39569,
	author = {Hill, John P., and University of Minnesota.},
	title = {Minnesota Symposia on Child Psychology},
	publisher = {University of Minnesota Press,},
	year = {c1969.},
	address = {Minneapolis [Minn.] :},
	note = {Sponsored by the Institute of Child Development of the University of Minnesota.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10231177}
}