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Subject
- Shipwrecks616
- History209
- Underwater archaeology106
- Antiquities72
- Titanic (Steamship)49
- Description and travel39
- History, Naval28
- Excavations (Archaeology)27
- Treasure troves24
- Survival after airplane accidents, shipwrecks, etc20
- Naval operations19
- Indians of North America14
- Shipwreck survival14
- Marine accidents13
- Seafaring life13
- Ships13
- Submarine13
- Barrow, Robert, d. 169712
- Navigation12
- World War, 1914-191812