Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Electric Power Use - Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 13, 1979," G.12.3 Industrial Production (1979-04-13) : 14-14. https://fraser.stlouisfed.org/title/55/item/59618/toc/470587 , accessed on April 30, 2024.