Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Kinds Outstanding and in Circulation," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1970," Federal Reserve Bulletin (February 1970) : 100-100. https://fraser.stlouisfed.org/title/62/item/21422/toc/161764 , accessed on March 29, 2024.