United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1986," Business Conditions Digest (July 1986) : 66-66. https://fraser.stlouisfed.org/title/43/item/7479/toc/129639 , accessed on April 23, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1986," Business Conditions Digest (July 1986) : 66-66. https://fraser.stlouisfed.org/title/43/item/7479/toc/129639 , accessed on April 23, 2024.