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-. "December 14, 1979," G.12.3 Industrial Production (1979-12-14) : 3-3. https://fraser.stlouisfed.org/title/55/item/59627/toc/470721 , accessed on May 2, 2024.