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. "December 1964," Federal Reserve Bulletin (December 1964) : 40-40. https://fraser.stlouisfed.org/title/62/item/21360/toc/247555 , accessed on March 28, 2024.