United States. Bureau of Labor Statistics. "Business Sector," in United States. Bureau of Labor Statistics. "Second Quarter 1992 [Revised] : Business, Nonfarm Business, Manufacturing, and Nonfinancial Corporations," Productivity and Costs (September 3, 1992) : 7-7. https://fraser.stlouisfed.org/title/131/item/55823/toc/465393 , accessed on April 19, 2024.