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-. "November 16, 1966," G.12.3 Industrial Production (1966-11-16) : 5-5. https://fraser.stlouisfed.org/title/55/item/59582/toc/487812 , accessed on May 2, 2024.