Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Kinds of United States Currency Outstanding and in Circulation," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1960," Federal Reserve Bulletin (July 1960) : 37-37. https://fraser.stlouisfed.org/title/62/item/21307/toc/67223 , accessed on April 25, 2024.