United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "August 1966," Business Conditions Digest (August 1966) : 3-4. https://fraser.stlouisfed.org/title/43/item/7230/toc/310748 , accessed on April 26, 2024.
United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "August 1966," Business Conditions Digest (August 1966) : 3-4. https://fraser.stlouisfed.org/title/43/item/7230/toc/310748 , accessed on April 26, 2024.