United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "December 1976," Business Conditions Digest (December 1976) : 2-2. https://fraser.stlouisfed.org/title/43/item/7364/toc/331516 , accessed on May 10, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "December 1976," Business Conditions Digest (December 1976) : 2-2. https://fraser.stlouisfed.org/title/43/item/7364/toc/331516 , accessed on May 10, 2024.