United States. Bureau of Labor Statistics. "Unit Costs, Unit Profits and Prices In Nonfinancial Corporations," in United States. Bureau of Labor Statistics. "Private Business, Nonfarm Business, and Manufacturing Sectors : Second Quarter 1979," Productivity and Costs (July 30, 1979) : 24-24. https://fraser.stlouisfed.org/title/131/item/55888/toc/433643 , accessed on May 7, 2024.