Cross-Classification of Business Indicators by Economic Process and Cyclical Timing
United States. Bureau of the Census. "Cross-Classification of Business Indicators by Economic Process and Cyclical Timing," in United States. Bureau of the Census. "March 1968," Business Conditions Digest (March 1968) : 5-5. https://fraser.stlouisfed.org/title/43/item/7249/toc/113800 , accessed on April 25, 2024.