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-. "April 15, 1980," G.12.3 Industrial Production (1980-04-15) : 17-17. https://fraser.stlouisfed.org/title/55/item/59781/toc/471944 , accessed on May 3, 2024.