Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Gross Public Debt of U.S. Treasury - Type and Ownership," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1993," Federal Reserve Bulletin (May 1993) : 220-220. https://fraser.stlouisfed.org/title/62/item/20852/toc/297838 , accessed on July 7, 2024.