United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975). https://fraser.stlouisfed.org/title/43/item/7350, accessed on May 7, 2024.
United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975). https://fraser.stlouisfed.org/title/43/item/7350, accessed on May 7, 2024.