Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Gross Public Debt, by Type of Security," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1971," Federal Reserve Bulletin (October 1971) : 154-154. https://fraser.stlouisfed.org/title/62/item/21441/toc/307914 , accessed on April 26, 2024.