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-. "September 16, 1976," G.12.3 Industrial Production (1976-09-16) : 15-16. https://fraser.stlouisfed.org/title/55/item/59523/toc/470109 , accessed on April 22, 2024.