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, 1985," G.12.3 Industrial Production (1985-01-15) : 13-13. https://fraser.stlouisfed.org/title/55/item/59688/toc/472972 , accessed on March 28, 2024.