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-. "June 13, 1986," G.12.3 Industrial Production (1986-06-13) : 4-4. https://fraser.stlouisfed.org/title/55/item/59706/toc/473284 , accessed on April 19, 2024.