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-. "April 13, 1979," G.12.3 Industrial Production (1979-04-13) : 16-16. https://fraser.stlouisfed.org/title/55/item/59618/toc/470580 , accessed on April 17, 2024.