@book{218404,
	author = {U.S. Census Bureau.},
	title = {Heads of families at the first census of theUnited States taken in the year 1790},
	publisher = {G.P.O},
	year = {1908},
	address = {Washington},
	note = {Includes index.},
	url = {http://purl.access.gpo.gov/GPO/LPS48020}
}