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-. "June 16, 1964," G.12.3 Industrial Production (1964-06-16) : 5-5. https://fraser.stlouisfed.org/title/55/item/59539/toc/486246 , accessed on March 28, 2024.