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-. "March 15, 1985," G.12.3 Industrial Production (1985-03-15) : 13-13. https://fraser.stlouisfed.org/title/55/item/59690/toc/473006 , accessed on May 9, 2024.