United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1973," Business Conditions Digest (July 1973) : 43-44. https://fraser.stlouisfed.org/title/43/item/7323/toc/158482 , accessed on May 3, 2024.
United States. Bureau of the Census. "Composite Indexes," in United States. Bureau of the Census. "July 1973," Business Conditions Digest (July 1973) : 43-44. https://fraser.stlouisfed.org/title/43/item/7323/toc/158482 , accessed on May 3, 2024.