Operation Downfall: The Devil Was in the Details (PDF) , by Marc Gallicchio

• Naval History and Heritage Command
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• MAGIC Background of Pearl Harbor - Vol. 1
• Magic Background of Pearl Harbor Vol. 2
• Magic Background of Pearl Harbor Vol. 2 Appendix
• Magic Background of Pearl Harbor Vol. 4
• Pearl Harbor Revisited: United States Navy Communications Intelligence 1924-1941
• Ringle Report on Japanese Internment