@book{229392,
	author = {United States},
	title = {Natural resources, a national responsibility},
	publisher = {Commission on Security and Cooperation in Europe},
	year = {2012.},
	address = {Washington},
	note = {At head of title: 111th Congress, 2d session.},
	url = {http://purl.fdlp.gov/GPO/gpo32373}
}