United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1977," Business Conditions Digest (January 1977) : 2-2. https://fraser.stlouisfed.org/title/43/item/7365/toc/253639 , accessed on March 29, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1977," Business Conditions Digest (January 1977) : 2-2. https://fraser.stlouisfed.org/title/43/item/7365/toc/253639 , accessed on March 29, 2024.