United States. Bureau of Labor Statistics. "Nonfinancial Corporate Sector : Third Quarter 1980," Productivity and Costs (November 26, 1980). https://fraser.stlouisfed.org/title/131/item/56000, accessed on April 17, 2024.
United States. Bureau of Labor Statistics. "Nonfinancial Corporate Sector : Third Quarter 1980," Productivity and Costs (November 26, 1980). https://fraser.stlouisfed.org/title/131/item/56000, accessed on April 17, 2024.