United States. Bureau of the Census. "GNP and Personal Income," in United States. Bureau of the Census. "May 1977," Business Conditions Digest (May 1977) : 85-85. https://fraser.stlouisfed.org/title/43/item/7369/toc/321325 , accessed on May 4, 2024.
United States. Bureau of the Census. "GNP and Personal Income," in United States. Bureau of the Census. "May 1977," Business Conditions Digest (May 1977) : 85-85. https://fraser.stlouisfed.org/title/43/item/7369/toc/321325 , accessed on May 4, 2024.