Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "United States Money, Outstanding and in Circulation, by Kinds," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1948," Federal Reserve Bulletin (April 1948) : 52-52. https://fraser.stlouisfed.org/title/62/item/21160/toc/425120 , accessed on April 18, 2024.