@book{34436,
	author = {Hill, Wilhelmina,},
	title = {Unit planning and teaching in elementary social studies.},
	publisher = {U.S. Dept. of Health, Educatio, and Welfare, Office of Education;},
	year = {1963]},
	series = {United States. Office of Education. Bulletin ;},
	address = {[Washington]},
	note = {"OE-31003."}
}