United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1976," Business Conditions Digest (June 1976) : 89-89. https://fraser.stlouisfed.org/title/43/item/7358/toc/71652 , accessed on April 17, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "June 1976," Business Conditions Digest (June 1976) : 89-89. https://fraser.stlouisfed.org/title/43/item/7358/toc/71652 , accessed on April 17, 2024.