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. "August 1967," Federal Reserve Bulletin (August 1967) : 109-109. https://fraser.stlouisfed.org/title/62/item/21392/toc/405962 , accessed on March 29, 2024.