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. "December 1961," Business Conditions Digest (December 1961) : 61-61. https://fraser.stlouisfed.org/title/43/item/7174/toc/311310 , accessed on April 23, 2024.