Business Cycle Reference Dates and Duration of Expansions and Contractions in the United States: 1854-1961
United States. Bureau of the Census. "Business Cycle Reference Dates and Duration of Expansions and Contractions in the United States: 1854-1961," in United States. Bureau of the Census. "November 1964," Business Conditions Digest (November 1964) : 67-67. https://fraser.stlouisfed.org/title/43/item/7209/toc/370343 , accessed on April 23, 2024.