United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "November 1967," Business Conditions Digest (November 1967) : 3-4. https://fraser.stlouisfed.org/title/43/item/7245/toc/73414 , accessed on March 28, 2024.
United States. Bureau of the Census. "Contents," in United States. Bureau of the Census. "November 1967," Business Conditions Digest (November 1967) : 3-4. https://fraser.stlouisfed.org/title/43/item/7245/toc/73414 , accessed on March 28, 2024.