Other U.S. Series with Business Cycle Significance
United States. Bureau of the Census. "Other U.S. Series with Business Cycle Significance," in United States. Bureau of the Census. "October 1961," Business Conditions Digest (October 1961) : 18-20. https://fraser.stlouisfed.org/title/43/item/7172/toc/299572 , accessed on March 29, 2024.