United States. Bureau of the Census. "NBER Short List," in United States. Bureau of the Census. "March 1975," Business Conditions Digest (March 1975) : 45-49. https://fraser.stlouisfed.org/title/43/item/7343/toc/63821 , accessed on April 19, 2024.
United States. Bureau of the Census. "NBER Short List," in United States. Bureau of the Census. "March 1975," Business Conditions Digest (March 1975) : 45-49. https://fraser.stlouisfed.org/title/43/item/7343/toc/63821 , accessed on April 19, 2024.