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. "May 1967," Federal Reserve Bulletin (May 1967) : 108-108. https://fraser.stlouisfed.org/title/62/item/21389/toc/390709 , accessed on April 19, 2024.