United States. Bureau of the Census. "Diffusion Indexes," in United States. Bureau of the Census. "August 1984," Business Conditions Digest (August 1984) : 80-83. https://fraser.stlouisfed.org/title/43/item/7456/toc/248044 , accessed on May 7, 2024.
United States. Bureau of the Census. "Diffusion Indexes," in United States. Bureau of the Census. "August 1984," Business Conditions Digest (August 1984) : 80-83. https://fraser.stlouisfed.org/title/43/item/7456/toc/248044 , accessed on May 7, 2024.