Board of Governors of the Federal Reserve System (U.S.), 1935-. "Summary 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) : 14-14. https://fraser.stlouisfed.org/title/55/item/59712/toc/473385 , accessed on April 25, 2024.