Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Paper Currency, by Denominations, and Coin in Circulation," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1940," Federal Reserve Bulletin (April 1940) : 54-54. https://fraser.stlouisfed.org/title/62/item/21024/toc/392507 , accessed on May 3, 2024.