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-. "August 14, 1964," G.12.3 Industrial Production (1964-08-14) : 5-5. https://fraser.stlouisfed.org/title/55/item/59549/toc/486522 , accessed on May 3, 2024.