Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "February 14, 1986," G.12.3 Industrial Production (1986-02-14) : 4-4. https://fraser.stlouisfed.org/title/55/item/59701/toc/473223 , accessed on April 28, 2024.