United States. Bureau of the Census. "September 1979," Business Conditions Digest (September 1979). https://fraser.stlouisfed.org/title/43/item/7397, accessed on March 29, 2024.
United States. Bureau of the Census. "September 1979," Business Conditions Digest (September 1979). https://fraser.stlouisfed.org/title/43/item/7397, accessed on March 29, 2024.