Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Market Groupings," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1972," Federal Reserve Bulletin (February 1972) : 167-167. https://fraser.stlouisfed.org/title/62/item/21446/toc/76628 , accessed on May 7, 2024.