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-. "January 17, 1966," G.12.3 Industrial Production (1966-01-17) : 2-2. https://fraser.stlouisfed.org/title/55/item/59808/toc/487396 , accessed on April 30, 2024.