Gutt, Camille, 1884-1971. Telegram to Secretary Snyder, Box 16, Folder 12, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=457346&filepath=/files/docs/historical/martin/16_12_19490710.pdf&start_page=1, accessed on September 26, 2017.
Former Finance Minister of Belgium regarding Snyder and Martin trip to Europe.
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources