Sproul, Allan, 1896-1978. Letter to Secretary of the Treasury, Box 16, Folder 2, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=456844&filepath=/files/docs/historical/martin/16_02_19501016.pdf, accessed on November 22, 2017.
Regarding authorization of FRBNY to act as fiscal agent of the office of Alien Property, Department of Justice
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources