Board of Governors of the Federal Reserve System (U.S.), 1935-. "Summary Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 15, 1982," G.12.3 Industrial Production (1982-01-15) : 14-14. https://fraser.stlouisfed.org/title/55/item/59651/toc/472304 , accessed on May 1, 2024.