Board of Governors of the Federal Reserve System (U.S.), 1935-. "Market Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 15, 1965," G.12.3 Industrial Production (1965-09-15) : 4-4. https://fraser.stlouisfed.org/title/55/item/59573/toc/487243 , accessed on May 2, 2024.