Board of Governors of the Federal Reserve System (U.S.), 1935-. "Foreign Official Assets Held at Federal Reserve Banks," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1987," Annual Statistical Digest (October 1988) : 154-154. https://fraser.stlouisfed.org/title/7/item/23493/toc/193484 , accessed on April 19, 2024.