Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Production: Industry Subtotals and Individual Series," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "August 16, 1991," G.17 Industrial Production and Capacity Utilization (1991-08-16) : 12-15. https://fraser.stlouisfed.org/title/77/item/63593/toc/454846 , accessed on May 4, 2024.