Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "U.S. Government Marketable and Convertible Securities," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1972," Federal Reserve Bulletin (June 1972) : 131-131. https://fraser.stlouisfed.org/title/62/item/21451/toc/14442 , accessed on April 19, 2024.