United States. Bureau of the Census. "Rates of Change," in United States. Bureau of the Census. "January 1973," Business Conditions Digest (January 1973) : 71-71. https://fraser.stlouisfed.org/title/43/item/7317/toc/177925 , accessed on May 7, 2024.
United States. Bureau of the Census. "Rates of Change," in United States. Bureau of the Census. "January 1973," Business Conditions Digest (January 1973) : 71-71. https://fraser.stlouisfed.org/title/43/item/7317/toc/177925 , accessed on May 7, 2024.