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 16, 1990," G.12.3 Industrial Production (1990-02-16) : 18-18. https://fraser.stlouisfed.org/title/55/item/59757/toc/450984 , accessed on April 18, 2024.