Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Margin Requirements," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1957," Federal Reserve Bulletin (June 1957) : 47-47. https://fraser.stlouisfed.org/title/62/item/21270/toc/427472 , accessed on May 7, 2024.