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. "August 1964," Federal Reserve Bulletin (August 1964) : 137-137. https://fraser.stlouisfed.org/title/62/item/21356/toc/294255 , accessed on April 18, 2024.