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, 1977," G.12.3 Industrial Production (1977-11-15) : 6-6. https://fraser.stlouisfed.org/title/55/item/59606/toc/470282 , accessed on March 28, 2024.