United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "June 1980," Business Conditions Digest (June 1980) : 102-102. https://fraser.stlouisfed.org/title/43/item/7406/toc/294630 , accessed on April 23, 2024.
United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "June 1980," Business Conditions Digest (June 1980) : 102-102. https://fraser.stlouisfed.org/title/43/item/7406/toc/294630 , accessed on April 23, 2024.