United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1980," Business Conditions Digest (January 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7403/toc/230728 , accessed on May 10, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1980," Business Conditions Digest (January 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7403/toc/230728 , accessed on May 10, 2024.