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Subject
- Railroads10
- Geology8
- Real property5
- Forests and forestry4
- Land capability for agriculture4
- Cartes3
- GeĢologie3
- Mines and mineral resources3
- Oil fields3
- Administrative and political divisions2
- Coal2
- Gold mines and mining2
- Indian reservations2
- Landowners2
- Topographic maps2
- Transportation2
- Apache Indians1
- Boats and boating1
- Caddo Indians1
- Comanche Indians1
