United States. Bureau of Labor Statistics. "Nondurable Manufacturing Sector," in United States. Bureau of Labor Statistics. "Private Business, Nonfarm Business, and Manufacturing Sectors : Third Quarter 1980," Productivity and Costs (October 27, 1980) : 10-10. https://fraser.stlouisfed.org/title/131/item/55896/toc/437649 , accessed on April 18, 2024.