Board of Governors of the Federal Reserve System (U.S.), 1935-. "Chart - Industrial Production Indexes. Total Industry. Manufacturing," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "July 15, 1991," G.17 Industrial Production and Capacity Utilization (1991-07-15) : 3-3. https://fraser.stlouisfed.org/title/77/item/63592/toc/454839 , accessed on April 18, 2024.