United States. Bureau of Labor Statistics. "First Quarter 1986," Productivity and Costs (April 28, 1986). https://fraser.stlouisfed.org/title/131/item/55792, accessed on May 10, 2024.
United States. Bureau of Labor Statistics. "First Quarter 1986," Productivity and Costs (April 28, 1986). https://fraser.stlouisfed.org/title/131/item/55792, accessed on May 10, 2024.