United States. Bureau of Labor Statistics. "Nonfinancial Corporations," in United States. Bureau of Labor Statistics. "Second Quarter 1986 : Revisions for Business, Nonfarm Business, and manufacturing and Preliminary Measures for Nonfinancial Corporations," Productivity and Costs (August 27, 1986) : 12-12. https://fraser.stlouisfed.org/title/131/item/55796/toc/478620 , accessed on April 19, 2024.