United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "June 1963," Business Conditions Digest (June 1963) : 1-1. https://fraser.stlouisfed.org/title/43/item/7192/toc/425238 , accessed on April 13, 2024.
United States. Bureau of the Census. "Cover Page," in United States. Bureau of the Census. "June 1963," Business Conditions Digest (June 1963) : 1-1. https://fraser.stlouisfed.org/title/43/item/7192/toc/425238 , accessed on April 13, 2024.