United States. Bureau of the Census. "November 1975," Business Conditions Digest (November 1975). https://fraser.stlouisfed.org/title/43/item/7351, accessed on April 25, 2024.
United States. Bureau of the Census. "November 1975," Business Conditions Digest (November 1975). https://fraser.stlouisfed.org/title/43/item/7351, accessed on April 25, 2024.