United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "May 1979," Business Conditions Digest (May 1979) : 66-66. https://fraser.stlouisfed.org/title/43/item/7393/toc/212768 , accessed on April 19, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "May 1979," Business Conditions Digest (May 1979) : 66-66. https://fraser.stlouisfed.org/title/43/item/7393/toc/212768 , accessed on April 19, 2024.