United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "January 1971," Business Conditions Digest (January 1971) : 70-70. https://fraser.stlouisfed.org/title/43/item/7550/toc/171275 , accessed on July 9, 2024.
United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "January 1971," Business Conditions Digest (January 1971) : 70-70. https://fraser.stlouisfed.org/title/43/item/7550/toc/171275 , accessed on July 9, 2024.