| |
| 2008 | ||
|---|---|---|
| 3 | EE | Ralph Erskine: Captured Kriegsmarine Enigma Documents at Bletchley Park. Cryptologia 32(3): 199-219 (2008) |
| 2006 | ||
| 2 | EE | Ralph Erskine: The 1944 Naval Brusa Agreement and its Aftermath. Cryptologia 30(1): 1-22 (2006) |
| 1 | EE | Ralph Erskine: The Poles Reveal their Secrets: Alastair Denniston's Account of the July 1939 Meeting at Pyry. Cryptologia 30(4): 294-305 (2006) |