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Subject
- Land use6
- Railroads5
- Administrative and political divisions2
- Economic conditions2
- Grain2
- Mines and mineral resources2
- Natural resources2
- Real property2
- Trade routes2
- Transportation2
- Copper ores1
- Forests and forestry1
- Geology1
- Geology, Structural1
- Gold ores1
- Homestead law1
- Indians of North America1
- Industrial districts1
- Industries1
- Land grants1
