@book{192300,
	author = {United States},
	title = {Census 2000 public use microdata sample (PUMS)},
	publisher = {U.S. Dept. of Commerce, Economics and Statistics Administration, U.S. Census Bureau},
	year = {[2003]},
	address = {Washington, DC},
	note = {Title from disc label.},
	url = {http://www.census.gov/support/PUMSdata.html}
}