Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market 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) : 4-4. https://fraser.stlouisfed.org/title/55/item/59667/toc/472588 , accessed on May 1, 2024.