United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "November 1967," Business Conditions Digest (November 1967) : 2-2. https://fraser.stlouisfed.org/title/43/item/7245/toc/73413 , accessed on April 19, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "November 1967," Business Conditions Digest (November 1967) : 2-2. https://fraser.stlouisfed.org/title/43/item/7245/toc/73413 , accessed on April 19, 2024.