United States. Bureau of Labor Statistics. "Manufacturing Sector," in United States. Bureau of Labor Statistics. "Business, Nonfarm Business, and Manufacturing Sectors : Second Quarter 1982," Productivity and Costs (July 29, 1982) : 5-5. https://fraser.stlouisfed.org/title/131/item/55997/toc/438691 , accessed on April 26, 2024.