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Subject
- Explorers7
- History6
- Admirals4
- Discovery and exploration4
- Ship captains3
- Engineers2
- German Americans2
- History, Naval2
- Kroehl, Julius, 1820-18672
- Naval operations2
- Nevelʹskoĭ, Gennadiĭ Ivanovich, 1813-18762
- Pacific Pearl Company2
- Pearl industry and trade2
- Shipwrecks2
- Sub Marine Explorer2
- Submarine2
- Submersibles2
- Voyages around the world2
- Adventure and adventurers1
- Armada, 15881