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-. "August 14, 1964," G.12.3 Industrial Production (1964-08-14) : 3-3. https://fraser.stlouisfed.org/title/55/item/59549/toc/486523 , accessed on May 2, 2024.