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. "May 1963," Federal Reserve Bulletin (May 1963) : 117-117. https://fraser.stlouisfed.org/title/62/item/21341/toc/65456 , accessed on March 28, 2024.