Board of Governors of the Federal Reserve System (U.S.), 1935-. "U.S. Reserve Assets," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "1970-1979," Annual Statistical Digest (March 1981) : 352-353. https://fraser.stlouisfed.org/title/7/item/23506/toc/190733 , accessed on May 4, 2024.