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-. "February 16, 1983," G.12.3 Industrial Production (1983-02-16) : 14-14. https://fraser.stlouisfed.org/title/55/item/59664/toc/472538 , accessed on April 19, 2024.