Board of Governors of the Federal Reserve System (U.S.), 1935-. "Seasonally Adjusted and Percentage Change Summary," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "April 15, 1974," G.12.3 Industrial Production (1974-04-15) : 1-2. https://fraser.stlouisfed.org/title/55/item/59538/toc/471505 , accessed on April 24, 2024.