United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "March 1985," Business Conditions Digest (March 1985) : 16-17. https://fraser.stlouisfed.org/title/43/item/7463/toc/302139 , accessed on May 4, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "March 1985," Business Conditions Digest (March 1985) : 16-17. https://fraser.stlouisfed.org/title/43/item/7463/toc/302139 , accessed on May 4, 2024.