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-. "May 16, 1978," G.12.3 Industrial Production (1978-05-16) : 14-14. https://fraser.stlouisfed.org/title/55/item/59610/toc/470381 , accessed on April 19, 2024.