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. "February 1963," Federal Reserve Bulletin (February 1963) : 139-139. https://fraser.stlouisfed.org/title/62/item/21338/toc/415834 , accessed on May 4, 2024.