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. "May 1967," Federal Reserve Bulletin (May 1967) : 153-153. https://fraser.stlouisfed.org/title/62/item/21389/toc/390770 , accessed on May 13, 2024.