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-. "June 15, 1984," G.12.3 Industrial Production (1984-06-15) : 6-6. https://fraser.stlouisfed.org/title/55/item/59680/toc/472856 , accessed on April 28, 2024.