@book{21037,
	author = {Blose, David T. and Covert, Timon,},
	title = {An age-grade study of 7,632 elementary pupils in 45 consolidated schools,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1930]},
	series = {United States. Office of Education. Pamphlet},
	address = {[Washington,},
	note = {Caption title.}
}