Board of Governors of the Federal Reserve System (U.S.), 1935-. "Electric Power Use: Manufacturing and Mining," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "October 17, 1991," G.17 Industrial Production and Capacity Utilization (1991-10-17) : 16-17. https://fraser.stlouisfed.org/title/77/item/63595/toc/454878 , accessed on April 24, 2024.