United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "October 1980," Business Conditions Digest (October 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7410/toc/258846 , accessed on May 5, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "October 1980," Business Conditions Digest (October 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7410/toc/258846 , accessed on May 5, 2024.