United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1979," Business Conditions Digest (June 1979) : 16-17. https://fraser.stlouisfed.org/title/43/item/7394/toc/256145 , accessed on March 29, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1979," Business Conditions Digest (June 1979) : 16-17. https://fraser.stlouisfed.org/title/43/item/7394/toc/256145 , accessed on March 29, 2024.