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. "April 1964," Federal Reserve Bulletin (April 1964) : 61-61. https://fraser.stlouisfed.org/title/62/item/21352/toc/415051 , accessed on May 7, 2024.