Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Total Debt, by Type of Security," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1966," Federal Reserve Bulletin (May 1966) : 63-63. https://fraser.stlouisfed.org/title/62/item/21377/toc/139175 , accessed on April 23, 2024.