United States. Bureau of the Census. "December 1965," Business Conditions Digest (December 1965). https://fraser.stlouisfed.org/title/43/item/7222, accessed on April 23, 2024.
United States. Bureau of the Census. "December 1965," Business Conditions Digest (December 1965). https://fraser.stlouisfed.org/title/43/item/7222, accessed on April 23, 2024.