@book{228926,
	author = {United States},
	title = {Annual report.},
	publisher = {U.S. Government Printing Office},
	year = {1993-},
	address = {Washington, DC},
	note = {Vols. for 2003- have accompanying CD-ROM with additional data tables; accompanying DVD, <2007->},
	url = {http://purl.access.gpo.gov/GPO/LPS8893}
}