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. "January 1970," Federal Reserve Bulletin (January 1970) : 157-157. https://fraser.stlouisfed.org/title/62/item/21421/toc/368304 , accessed on April 24, 2024.