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-. "October 14, 1977," G.12.3 Industrial Production (1977-10-14) : 15-15. https://fraser.stlouisfed.org/title/55/item/59788/toc/470249 , accessed on April 18, 2024.