Martin, William McChesney. Letter "Dear Charlie", Box 2, Folder 3, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=456892&filepath=/files/docs/historical/martin/02_03_19351025.pdf&start_page=1, accessed on September 22, 2017.
Life at NYSE
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources