United States. Bureau of Labor Statistics. "Business Sector," in United States. Bureau of Labor Statistics. "Third Quarter 1985 : Revised Data for Business, Nonfarm Business, and Manufacturing and Preliminary Measures for Nonfinancial Corporations," Productivity and Costs (December 2, 1985) : 6-6. https://fraser.stlouisfed.org/title/131/item/55790/toc/436103 , accessed on April 20, 2024.