Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 15, 1989," G.12.3 Industrial Production (1989-05-15) : 5-5. https://fraser.stlouisfed.org/title/55/item/59748/toc/474538 , accessed on May 2, 2024.