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-. "March 16, 1965," G.12.3 Industrial Production (1965-03-16) : 4-4. https://fraser.stlouisfed.org/title/55/item/59567/toc/487057 , accessed on April 26, 2024.