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. "January 1971," Federal Reserve Bulletin (January 1971) : 94-94. https://fraser.stlouisfed.org/title/62/item/21434/toc/201196 , accessed on April 23, 2024.