Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Kinds of Money in Circulation," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1941," Federal Reserve Bulletin (April 1941) : 48-48. https://fraser.stlouisfed.org/title/62/item/21036/toc/70450 , accessed on March 19, 2024.