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Subject
- Description and travel[remove]43
- Natural history42
- Travel16
- History12
- Naturalists11
- Scientific expeditions7
- Botany6
- Discovery and exploration6
- Audubon, John James, 1785-18515
- Muir, John, 1838-19144
- Birds3
- Ethics3
- Indians of North America3
- River steamers3
- Wildlife artists3
- Antiquities2
- Explorers2
- French2
- Frontier and pioneer life2
- Germans2