Board of Governors of the Federal Reserve System (U.S.), 1935-. "Electric Power Use by Industries, Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "July 15, 1981," G.12.3 Industrial Production (1981-07-15) : 16-16. https://fraser.stlouisfed.org/title/55/item/59644/toc/472187 , accessed on April 25, 2024.