Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Average Rates of Exchange of Principal Foreign Currencies at New York," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1921," Federal Reserve Bulletin (December 1921) : 5-5. https://fraser.stlouisfed.org/title/62/item/20530/toc/149822 , accessed on May 5, 2024.