United States. Bureau of the Census. "Rates of Change," in United States. Bureau of the Census. "July 1970," Business Conditions Digest (July 1970) : 67-67. https://fraser.stlouisfed.org/title/43/item/7544/toc/187194 , accessed on May 5, 2024.
United States. Bureau of the Census. "Rates of Change," in United States. Bureau of the Census. "July 1970," Business Conditions Digest (July 1970) : 67-67. https://fraser.stlouisfed.org/title/43/item/7544/toc/187194 , accessed on May 5, 2024.