United States. Bureau of the Census. "Diffusion Indexes," in United States. Bureau of the Census. "August 1982," Business Conditions Digest (August 1982) : 80-83. https://fraser.stlouisfed.org/title/43/item/7432/toc/195216 , accessed on May 4, 2024.
United States. Bureau of the Census. "Diffusion Indexes," in United States. Bureau of the Census. "August 1982," Business Conditions Digest (August 1982) : 80-83. https://fraser.stlouisfed.org/title/43/item/7432/toc/195216 , accessed on May 4, 2024.