Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Convertible Foreign Currency Held by Federal Reserve Banks," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1973," Federal Reserve Bulletin (April 1973) : 87-87. https://fraser.stlouisfed.org/title/62/item/21460/toc/123107 , accessed on March 19, 2024.