| ID: | 12592 |
|---|---|
| Entry Text: | Kahn, David. Seizing the Enigma: The Race to Break the German U-Boat Codes, 1939-1943. London: Souvenir; Boston: Houghton Mifflin, 1991, 1992, xii, 336 pp. Specialized part of Ultra; seizure of German codebooks & equipment by RN. |