United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "June 1964," Business Conditions Digest (June 1964) : 1-1. https://fraser.stlouisfed.org/title/43/item/7204/toc/67350 , accessed on March 29, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "June 1964," Business Conditions Digest (June 1964) : 1-1. https://fraser.stlouisfed.org/title/43/item/7204/toc/67350 , accessed on March 29, 2024.