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-. "February 15, 1989," G.12.3 Industrial Production (1989-02-15) : 16-16. https://fraser.stlouisfed.org/title/55/item/59745/toc/474481 , accessed on April 19, 2024.