Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "February 15, 1965," G.12.3 Industrial Production (1965-02-15) : 5-5. https://fraser.stlouisfed.org/title/55/item/59772/toc/487026 , accessed on April 26, 2024.