United States. Bureau of Labor Statistics. "Nonfinancial Corporate Sector : First Quarter 1983," Productivity and Costs (May 26, 1983). https://fraser.stlouisfed.org/title/131/item/55769, accessed on April 23, 2024.
United States. Bureau of Labor Statistics. "Nonfinancial Corporate Sector : First Quarter 1983," Productivity and Costs (May 26, 1983). https://fraser.stlouisfed.org/title/131/item/55769, accessed on April 23, 2024.