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-. "May 13, 1983," G.12.3 Industrial Production (1983-05-13) : 6-6. https://fraser.stlouisfed.org/title/55/item/59667/toc/472595 , accessed on April 25, 2024.