Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Subtotals and Individual Series, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "November 13, 1981," G.12.3 Industrial Production (1981-11-13) : 8-8. https://fraser.stlouisfed.org/title/55/item/59649/toc/472257 , accessed on April 19, 2024.