United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "May 1980," Business Conditions Digest (May 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7405/toc/250471 , accessed on May 1, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "May 1980," Business Conditions Digest (May 1980) : 2-2. https://fraser.stlouisfed.org/title/43/item/7405/toc/250471 , accessed on May 1, 2024.