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Breaking Japanese Diplomatic Codes »

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  1. David Sissons and D Special Section (PDF, 213KB)Desmond Ball
  2. The Diplomatic Special Intelligence Section: Its Origins and History (PDF, 446KB)D.C.S. Sissons
  3. Japanese Diplomatic Cyphers: Cryptographic Survey Report Of Special Intelligence Section HQ Australian Military Forces Melbourne 1946 (PDF, 1.8MB)

Annexes: Interviews, Correspondence and Notes (PDF, 48KB)