| ID | 026552 |
| Call Number | 940.5486/LEW |
| Title Proper | Ultra goes to war |
| Other Title Information | the secret story |
| Language | ENG |
| Author | Lewin, Ronald |
| Publication | London, Hutchunson and Co. Ltd., 1978. |
| Description | 398p.: ill. Hbk+ 24cm. |
| Classification Number | 940.5486 |
| Key Words | World War - 1939-1945 - Secret service ; Military Intelligence - History ; Ciphers - History ; World War II |