Martin, William McChesney. Letter to William L. Clayton, Box 14, Folder 3, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=457231&filepath=/files/docs/historical/martin/14_03_19480610.pdf, accessed on November 21, 2017.
Regarding Douglas H. Allen's observations on Export-Import Bank lending activities
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources