Martin, William McChesney. Letter to Hart, Box 1, Folder 2, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=456709&filepath=/files/docs/historical/martin/01_02_19360527.pdf, accessed on December 12, 2017.
Letter describing market conditions
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources