Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Estimated Foreign Holdings of Marketable U.S. Treasury Bonds and Notes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1973," Federal Reserve Bulletin (June 1973) : 182-182. https://fraser.stlouisfed.org/title/62/item/21462/toc/148710 , accessed on April 23, 2024.