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-. "June 14, 1985," G.12.3 Industrial Production (1985-06-14) : 13-13. https://fraser.stlouisfed.org/title/55/item/59693/toc/473064 , accessed on May 1, 2024.