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. "September 1975," Federal Reserve Bulletin (September 1975) : 78-78. https://fraser.stlouisfed.org/title/62/item/21489/toc/416599 , accessed on March 28, 2024.