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-. "June 15, 1979," G.12.3 Industrial Production (1979-06-15) : 3-3. https://fraser.stlouisfed.org/title/55/item/59620/toc/470612 , accessed on May 1, 2024.