United States. Bureau of the Census. "August 1975," Business Conditions Digest (August 1975). https://fraser.stlouisfed.org/title/43/item/7348, accessed on April 25, 2024.
United States. Bureau of the Census. "August 1975," Business Conditions Digest (August 1975). https://fraser.stlouisfed.org/title/43/item/7348, accessed on April 25, 2024.