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 : Third Quarter 1979," Productivity and Costs (October 29, 1979) : 14-14. https://fraser.stlouisfed.org/title/131/item/55891/toc/495094 , accessed on April 27, 2024.