United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1980," Business Conditions Digest (November 1980) : 1-1. https://fraser.stlouisfed.org/title/43/item/7411/toc/73848 , accessed on July 14, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "November 1980," Business Conditions Digest (November 1980) : 1-1. https://fraser.stlouisfed.org/title/43/item/7411/toc/73848 , accessed on July 14, 2024.