@book{218334,
	author = {U.S. Census Bureau.},
	title = {U.S. merchandise trade},
	publisher = {U.S. Dept. of Commerce, Bureau of the Census},
	year = {1991-},
	address = {Washington D.C.},
	note = {"FT920"},
	url = {http://purl.access.gpo.gov/GPO/LPS63964}
}