United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1979," Business Conditions Digest (July 1979) : 16-17. https://fraser.stlouisfed.org/title/43/item/7395/toc/235463 , accessed on April 17, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1979," Business Conditions Digest (July 1979) : 16-17. https://fraser.stlouisfed.org/title/43/item/7395/toc/235463 , accessed on April 17, 2024.