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Subject
- Real property30
- Railroads21
- Administrative and political divisions20
- Maps18
- Boundaries13
- Discovery and exploration10
- Land grants9
- World War, 1914-19189
- History6
- Indians of North America6
- Coasts5
- Gold mines and mining5
- Mines and mineral resources5
- Roads5
- Geology4
- Streets4
- Travel4
- Campaigns3
- Description and travel3
- Harbors3
