United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "October 1977," Business Conditions Digest (October 1977) : 3-4. https://fraser.stlouisfed.org/title/43/item/7374/toc/392149 , accessed on May 3, 2024.
United States. Bureau of the Census. "Table of Contents," in United States. Bureau of the Census. "October 1977," Business Conditions Digest (October 1977) : 3-4. https://fraser.stlouisfed.org/title/43/item/7374/toc/392149 , accessed on May 3, 2024.