Board of Governors of the Federal Reserve System (U.S.), 1935-. "Marketable U.S. Treasury Bonds and Notes - Foreign Transactions," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1987," Annual Statistical Digest (October 1988) : 155-155. https://fraser.stlouisfed.org/title/7/item/23493/toc/193485 , accessed on April 25, 2024.