United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "June 1969," Business Conditions Digest (June 1969) : 69-69. https://fraser.stlouisfed.org/title/43/item/7531/toc/242251 , accessed on April 25, 2024.
United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "June 1969," Business Conditions Digest (June 1969) : 69-69. https://fraser.stlouisfed.org/title/43/item/7531/toc/242251 , accessed on April 25, 2024.