United States. Bureau of the Census. "Cyclical Indicators," in United States. Bureau of the Census. "May 1983," Business Conditions Digest (May 1983) : 12-14. https://fraser.stlouisfed.org/title/43/item/7441/toc/182704 , accessed on April 25, 2024.
United States. Bureau of the Census. "Cyclical Indicators," in United States. Bureau of the Census. "May 1983," Business Conditions Digest (May 1983) : 12-14. https://fraser.stlouisfed.org/title/43/item/7441/toc/182704 , accessed on April 25, 2024.