Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "December 15, 1983," G.12.3 Industrial Production (1983-12-15) : 3-3. https://fraser.stlouisfed.org/title/55/item/59674/toc/472734 , accessed on April 25, 2024.