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. "December 1965," Federal Reserve Bulletin (December 1965) : 125-125. https://fraser.stlouisfed.org/title/62/item/21372/toc/58062 , accessed on April 18, 2024.