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-. "September 15, 1987," G.12.3 Industrial Production (1987-09-15) : 17-17. https://fraser.stlouisfed.org/title/55/item/59723/toc/473870 , accessed on March 29, 2024.