Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "November 14, 1986," G.12.3 Industrial Production (1986-11-14) : 6-6. https://fraser.stlouisfed.org/title/55/item/59712/toc/473377 , accessed on April 26, 2024.