United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1979," Business Conditions Digest (June 1979) : 66-66. https://fraser.stlouisfed.org/title/43/item/7394/toc/256172 , accessed on May 9, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1979," Business Conditions Digest (June 1979) : 66-66. https://fraser.stlouisfed.org/title/43/item/7394/toc/256172 , accessed on May 9, 2024.