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-. "April 15, 1965," G.12.3 Industrial Production (1965-04-15) : 3-3. https://fraser.stlouisfed.org/title/55/item/59568/toc/487088 , accessed on March 28, 2024.