Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industry Groupings, Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1963," Federal Reserve Bulletin (October 1963) : 101-101. https://fraser.stlouisfed.org/title/62/item/21346/toc/197823 , accessed on April 26, 2024.