United States. Bureau of the Census. "March 1974," Business Conditions Digest (March 1974). https://fraser.stlouisfed.org/title/43/item/7331, accessed on April 24, 2024.
United States. Bureau of the Census. "March 1974," Business Conditions Digest (March 1974). https://fraser.stlouisfed.org/title/43/item/7331, accessed on April 24, 2024.