United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "May 1976," Business Conditions Digest (May 1976) : 43-44. https://fraser.stlouisfed.org/title/43/item/7357/toc/116553 , accessed on March 28, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "May 1976," Business Conditions Digest (May 1976) : 43-44. https://fraser.stlouisfed.org/title/43/item/7357/toc/116553 , accessed on March 28, 2024.