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-. "June 16, 1987," G.12.3 Industrial Production (1987-06-16) : 16-16. https://fraser.stlouisfed.org/title/55/item/59720/toc/473819 , accessed on April 18, 2024.