Martin, William McChesney. Letter to Matt S. Szymczak, Box 13, Folder 6, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=457235&filepath=/files/docs/historical/martin/13_06_19461003.pdf&start_page=1, accessed on September 22, 2017.
Regarding role of Export-Import Bank
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources