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-. "August 15, 1978," G.12.3 Industrial Production (1978-08-15) : 5-5. https://fraser.stlouisfed.org/title/55/item/59613/toc/470443 , accessed on April 30, 2024.