Griswold, O. W. (Oscar Woolverton), 1886-1959. Memorandum re Officer Candidate School, Box 9, Folder 5, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/content/?item_id=457321&filepath=/files/docs/historical/martin/09_05_19410722.pdf, accessed on July 23, 2018.
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources