Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "October 16, 1980," G.12.3 Industrial Production (1980-10-16) : 6-6. https://fraser.stlouisfed.org/title/55/item/59637/toc/472065 , accessed on April 19, 2024.