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-. "June 15, 1982," G.12.3 Industrial Production (1982-06-15) : 6-6. https://fraser.stlouisfed.org/title/55/item/59656/toc/472393 , accessed on March 29, 2024.