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 14, 1978," G.12.3 Industrial Production (1978-04-14) : 14-14. https://fraser.stlouisfed.org/title/55/item/59605/toc/470378 , accessed on April 18, 2024.