United States. Bureau of the Census. "Consumers' Prices," in United States. Bureau of the Census. "April 1969," Business Conditions Digest (April 1969) : 67-67. https://fraser.stlouisfed.org/title/43/item/7529/toc/216906 , accessed on May 10, 2024.
United States. Bureau of the Census. "Consumers' Prices," in United States. Bureau of the Census. "April 1969," Business Conditions Digest (April 1969) : 67-67. https://fraser.stlouisfed.org/title/43/item/7529/toc/216906 , accessed on May 10, 2024.