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, 1986," G.12.3 Industrial Production (1986-05-15) : 3-3. https://fraser.stlouisfed.org/title/55/item/59705/toc/473264 , accessed on April 18, 2024.