Board of Governors of the Federal Reserve System (U.S.), 1935-. "Seasonally Adjusted Indexes," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "June 15, 1979," G.12.3 Industrial Production (1979-06-15) : 16-16. https://fraser.stlouisfed.org/title/55/item/59620/toc/470607 , accessed on April 25, 2024.