United States. Selective Service System. Notice of Classification, Box 9, Folder 4, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/content/?item_id=457261&filepath=/files/docs/historical/martin/09_04_19410226.pdf, accessed on May 24, 2018.
Martin classified 1-A by the local Selective Service Board.
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources