Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "March 14, 1986," G.12.3 Industrial Production (1986-03-14) : 6-6. https://fraser.stlouisfed.org/title/55/item/59702/toc/473240 , accessed on April 28, 2024.