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-. "January 16, 1980," G.12.3 Industrial Production (1980-01-16) : 4-4. https://fraser.stlouisfed.org/title/55/item/59628/toc/471899 , accessed on May 2, 2024.