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. "May 1972," Federal Reserve Bulletin (May 1972) : 138-138. https://fraser.stlouisfed.org/title/62/item/21450/toc/56540 , accessed on May 9, 2024.