United States. Bureau of the Census. "Consumers' Prices," in United States. Bureau of the Census. "May 1969," Business Conditions Digest (May 1969) : 67-67. https://fraser.stlouisfed.org/title/43/item/7530/toc/303375 , accessed on April 26, 2024.
United States. Bureau of the Census. "Consumers' Prices," in United States. Bureau of the Census. "May 1969," Business Conditions Digest (May 1969) : 67-67. https://fraser.stlouisfed.org/title/43/item/7530/toc/303375 , accessed on April 26, 2024.