Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industrial Electric Power Use - Not Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "August 15, 1977," G.12.3 Industrial Production (1977-08-15) : 16-17. https://fraser.stlouisfed.org/title/55/item/59790/toc/470223 , accessed on April 26, 2024.