United States. Bureau of the Census. "Production and Income," in United States. Bureau of the Census. "June 1977," Business Conditions Digest (June 1977) : 68-69. https://fraser.stlouisfed.org/title/43/item/7370/toc/175384 , accessed on May 9, 2024.
United States. Bureau of the Census. "Production and Income," in United States. Bureau of the Census. "June 1977," Business Conditions Digest (June 1977) : 68-69. https://fraser.stlouisfed.org/title/43/item/7370/toc/175384 , accessed on May 9, 2024.