United States. Bureau of the Census. "May 1963," Business Conditions Digest (May 1963). https://fraser.stlouisfed.org/title/43/item/7191, accessed on May 10, 2024.
United States. Bureau of the Census. "May 1963," Business Conditions Digest (May 1963). https://fraser.stlouisfed.org/title/43/item/7191, accessed on May 10, 2024.