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. "July 1964," Business Conditions Digest (July 1964) : 72-72. https://fraser.stlouisfed.org/title/43/item/7205/toc/258108 , accessed on April 25, 2024.