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-. "September 14, 1984," G.12.3 Industrial Production (1984-09-14) : 5-5. https://fraser.stlouisfed.org/title/55/item/59683/toc/472898 , accessed on April 25, 2024.