United States. Bureau of the Census. "March 1979," Business Conditions Digest (March 1979). https://fraser.stlouisfed.org/title/43/item/7391, accessed on May 9, 2024.
United States. Bureau of the Census. "March 1979," Business Conditions Digest (March 1979). https://fraser.stlouisfed.org/title/43/item/7391, accessed on May 9, 2024.