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. "November 1969," Federal Reserve Bulletin (November 1969) : 105-105. https://fraser.stlouisfed.org/title/62/item/21419/toc/292337 , accessed on April 19, 2024.