Complete Titles and Sources of Principal Business Cycle Series and Diffusion Indexes
United States. Bureau of the Census. "Complete Titles and Sources of Principal Business Cycle Series and Diffusion Indexes," in United States. Bureau of the Census. "December 1961," Business Conditions Digest (December 1961) : 67-68. https://fraser.stlouisfed.org/title/43/item/7174/toc/311315 , accessed on April 18, 2024.