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) : 19-19. https://fraser.stlouisfed.org/title/55/item/59723/toc/473884 , accessed on April 25, 2024.