U-boat ; the secret menace.
| Author/creator | Mason, David, 1938- |
| Format | Book |
| Publication Info | [New York] : [Ballantine Books], [1968] |
| Description | 160 pages : illustrations, maps, portraits ; 21 cm. |
| Subjects |
| Series | Ballantine's illustrated history of World War II. Weapons book, no. 1 |
| LCCN | 68007403 |