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-. "October 16, 1981," G.12.3 Industrial Production (1981-10-16) : 8-8. https://fraser.stlouisfed.org/title/55/item/59648/toc/472247 , accessed on March 28, 2024.