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. "September 1974," Federal Reserve Bulletin (September 1974) : 123-123. https://fraser.stlouisfed.org/title/62/item/21477/toc/143896 , accessed on April 24, 2024.