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Subject
- Natural history24
- Description and travel16
- Indians of South America6
- Indians of North America5
- Scientific expeditions4
- Indians3
- Indians of Mexico3
- Languages3
- Assiniboine Indians2
- Colonies2
- Cree Indians2
- Dakota Indians2
- Geology2
- Hidatsa Indians2
- History2
- Indians of Central America2
- Indians of the West Indies2
- Mandan Indians2
- Mines and mineral resources2
- Commerce1