Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Kinds of Currency in Circulation," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1938," Federal Reserve Bulletin (May 1938) : 39-39. https://fraser.stlouisfed.org/title/62/item/21001/toc/276675 , accessed on May 4, 2024.