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-. "July 14, 1989," G.12.3 Industrial Production (1989-07-14) : 16-16. https://fraser.stlouisfed.org/title/55/item/59750/toc/474583 , accessed on April 17, 2024.