@book{218411,
	author = {U.S. Census Bureau.},
	title = {Educational attainment in the United States},
	publisher = {U.S. Dept. of Commerce, Bureau of the Census},
	address = {Washington, D.C.},
	note = {Description based on: Mar.1973 and 1974},
	url = {http://purl.access.gpo.gov/GPO/LPS6304}
}