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. "April 1963," Business Conditions Digest (April 1963) : 67-67. https://fraser.stlouisfed.org/title/43/item/7190/toc/260159 , accessed on May 7, 2024.