@book{193825,
	author = {United States},
	title = {SPI},
	publisher = {U.S. Dept. of Commerce, Economics and Statistics Administration, Bureau of Economic Analysis, Regional Economic Measurement Division},
	address = {Washington, DC},
	note = {Description based on: 1929/2000; title from disc label.},
	url = {http://purl.access.gpo.gov/GPO/LPS33351}
}