United States. Bureau of the Census. "NBER Leading Indicators," in United States. Bureau of the Census. "May 1962," Business Conditions Digest (May 1962) : 23-26. https://fraser.stlouisfed.org/title/43/item/7179/toc/120676 , accessed on May 8, 2024.
United States. Bureau of the Census. "NBER Leading Indicators," in United States. Bureau of the Census. "May 1962," Business Conditions Digest (May 1962) : 23-26. https://fraser.stlouisfed.org/title/43/item/7179/toc/120676 , accessed on May 8, 2024.