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 17, 1969," G.12.3 Industrial Production (1969-11-17) : 5-5. https://fraser.stlouisfed.org/title/55/item/59557/toc/492501 , accessed on June 27, 2024.