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-. "February 17, 1982," G.12.3 Industrial Production (1982-02-17) : 4-4. https://fraser.stlouisfed.org/title/55/item/59652/toc/472326 , accessed on April 19, 2024.