Martin, William McChesney. Letter to Mr. Allan Sproul, Box 16, Folder 2, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=456866&filepath=/files/docs/historical/martin/16_02_19500815.pdf, accessed on December 15, 2017.
Part of exchange re British reserves
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources