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 15, 1973," G.12.3 Industrial Production (1973-11-15) : 10-10. https://fraser.stlouisfed.org/title/55/item/59543/toc/471465 , accessed on May 4, 2024.