Submarine warfare
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- Focus of16
- Submarine warfare -- Japan
- Submarine warfare -- Pacific Ocean -- Drama
- Submarine warfare -- Soviet Union -- History
- Submarine warfare -- United States -- History -- 18th century
- Submarine warfare -- Germany
- Submarine warfare -- United States
- Submarine warfare
- Submarine warfare -- Bibliography
- Submarine warfare -- Germany -- History
- Submarine warfare -- Drama
- Submarine warfare -- Fiction
- Submarine warfare -- United States -- History -- 20th century
- Submarine warfare -- Juvenile literature
- Submarine warfare -- Great Britain -- History
- Submarine warfare -- Atlantic Ocean -- Drama
- Submarine warfare -- Germany -- History -- 20th century
- Sub focus of6