Board of Governors of the Federal Reserve System (U.S.), 1935-. "Electric Power Use by Industries, Not Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "May 15, 1987," G.12.3 Industrial Production (1987-05-15) : 16-16. https://fraser.stlouisfed.org/title/55/item/59719/toc/473802 , accessed on April 19, 2024.