Martin, William McChesney. Letter to Matt S. Szymczak, Box 13, Folder 6, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/archival/1341/item/457235, accessed on October 22, 2018.
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