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. "1957," Annual Report of the Board of Governors of the Federal Reserve System (1957) : 106-106. https://fraser.stlouisfed.org/title/117/item/2413/toc/34293 , accessed on April 19, 2024.