Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. Letter From the Secretary re Investigation of Federal Reserve Note Circulation, Number X-1267, Volume 9, Page 37, Mimeograph Letters and Statements of the Board. Board of Governors of the Federal Reserve System (U.S.), 1935-. https://fraser.stlouisfed.org/archival/4957/item/512188, accessed on March 15, 2026.