United States. Bureau of Labor Statistics. "Manufacturing Sector," in United States. Bureau of Labor Statistics. "Revised First-Quarter [1986] Measures for Business, Nonfarm Business and Manufacturing and Preliminary Measures for Nonfinancial Corporations," Productivity and Costs (May 29, 1986) : 9-9. https://fraser.stlouisfed.org/title/131/item/55793/toc/447117 , accessed on April 19, 2024.