Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "U.S. Government Marketable and Convertible Securities Outstanding," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1969," Federal Reserve Bulletin (February 1969) : 132-132. https://fraser.stlouisfed.org/title/62/item/21410/toc/194693 , accessed on April 19, 2024.