Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Federal Reserve Notes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1921," Federal Reserve Bulletin (April 1921) : 111-111. https://fraser.stlouisfed.org/title/62/item/20522/toc/7711 , accessed on May 8, 2024.