@book{123912,
	author = {Piers, Maria W., and Erikson Institute.},
	title = {Play and development :},
	publisher = {Norton,},
	year = {1972.},
	address = {New York :},
	edition = {[1st ed.]},
	note = {Six papers from a series of meetings planned by the Erikson Institute, the School of Education, and the Dept. of Psychology of Loyola University, as part of the university's centennial activities.}
}