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) : 16-16. https://fraser.stlouisfed.org/title/55/item/59757/toc/450982 , accessed on May 4, 2024.