Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "December 14, 1979," G.12.3 Industrial Production (1979-12-14) : 5-5. https://fraser.stlouisfed.org/title/55/item/59627/toc/470723 , accessed on May 2, 2024.