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-. "May 15, 1984," G.12.3 Industrial Production (1984-05-15) : 13-13. https://fraser.stlouisfed.org/title/55/item/59679/toc/472835 , accessed on May 4, 2024.