The maybe monsters
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Ufos and Ifos: A Factual Report on Flying Saucers
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Mystery Creatures of the Jungle
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The long trail: How cowboys & longhorns opened the West
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Mystery monsters of the deep
$5.39
The Greatest Depths; Probing the Seas to 20,000 Feet and Below.
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New discoveries in oceanography
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Antarctica (A First Book)
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Men who dared the sea: The ocean adventures of the ancient mariners
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the mystery monsters
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Undersea Frontiers Exploring by Deep Sea Submarines
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Sea rescue
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Gemini and Apollo
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Christopher Columbus: On the Green Sea of Darkness
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Surprising Facts About Our World and Beyond. -
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Wide Ocean
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The Maybe Monsters
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Tomorrow's World of Science; the Challenge of Today's Experiments
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