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-. "March 16, 1979," G.12.3 Industrial Production (1979-03-16) : 5-5. https://fraser.stlouisfed.org/title/55/item/59617/toc/470572 , accessed on May 7, 2024.