Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1964," Federal Reserve Bulletin (October 1964) : 93-93. https://fraser.stlouisfed.org/title/62/item/21358/toc/121929 , accessed on April 25, 2024.