Martin, William McChesney. Letter to Mr. M.S. Szymczak, Box 16, Folder 2, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/scribd/?item_id=456834&filepath=/files/docs/historical/martin/16_02_19500118.pdf&start_page=1, accessed on October 20, 2017.
Letter regarding relationship of the Federal Reserve Banks to the Board in the international field
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources