Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production: Market Groups," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "January 16, 1991," G.17 Industrial Production and Capacity Utilization (1991-01-16) : 4-5. https://fraser.stlouisfed.org/title/77/item/63586/toc/454756 , accessed on March 29, 2024.