United States. Bureau of the Census. "Cyclical Indicators," in United States. Bureau of the Census. "May 1976," Business Conditions Digest (May 1976) : 12-13. https://fraser.stlouisfed.org/title/43/item/7357/toc/116533 , accessed on May 11, 2024.
United States. Bureau of the Census. "Cyclical Indicators," in United States. Bureau of the Census. "May 1976," Business Conditions Digest (May 1976) : 12-13. https://fraser.stlouisfed.org/title/43/item/7357/toc/116533 , accessed on May 11, 2024.