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-. "November 17, 1970," G.12.3 Industrial Production (1970-11-17) : 3-3. https://fraser.stlouisfed.org/title/55/item/59765/toc/468159 , accessed on March 28, 2024.