United States. Bureau of the Census. "June 1963," Business Conditions Digest (June 1963). https://fraser.stlouisfed.org/title/43/item/7192, accessed on March 28, 2024.
United States. Bureau of the Census. "June 1963," Business Conditions Digest (June 1963). https://fraser.stlouisfed.org/title/43/item/7192, accessed on March 28, 2024.