United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1983," Business Conditions Digest (June 1983) : 16-17. https://fraser.stlouisfed.org/title/43/item/7442/toc/51330 , accessed on June 23, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1983," Business Conditions Digest (June 1983) : 16-17. https://fraser.stlouisfed.org/title/43/item/7442/toc/51330 , accessed on June 23, 2024.