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-. "May 15, 1985," G.12.3 Industrial Production (1985-05-15) : 3-3. https://fraser.stlouisfed.org/title/55/item/59692/toc/473054 , accessed on May 4, 2024.