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. "March 1972," Federal Reserve Bulletin (March 1972) : 186-186. https://fraser.stlouisfed.org/title/62/item/21447/toc/35443 , accessed on May 12, 2024.