United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "July 1977," Business Conditions Digest (July 1977) : 2-2. https://fraser.stlouisfed.org/title/43/item/7371/toc/219033 , accessed on May 10, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "July 1977," Business Conditions Digest (July 1977) : 2-2. https://fraser.stlouisfed.org/title/43/item/7371/toc/219033 , accessed on May 10, 2024.