United States. Bureau of Labor Statistics. "Second Quarter 1972," Productivity and Costs (July 27, 1972). https://fraser.stlouisfed.org/title/131/item/55812, accessed on May 8, 2024.
United States. Bureau of Labor Statistics. "Second Quarter 1972," Productivity and Costs (July 27, 1972). https://fraser.stlouisfed.org/title/131/item/55812, accessed on May 8, 2024.