Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "October 16, 1964," G.12.3 Industrial Production (1964-10-16) : 2-2. https://fraser.stlouisfed.org/title/55/item/59551/toc/486783 , accessed on April 18, 2024.