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Subject
- Description and travel155
- Economic conditions97
- Gold mines and mining97
- Social life and customs97
- Gold discoveries66
- Women58
- Gold miners56
- History56
- Mines and mineral resources53
- Indians of North America50
- Politics and government42
- Real property42
- Voyages to the Pacific coast36
- Overland journeys to the Pacific32
- Frontier and pioneer life30
- Commerce25
- Agriculture22
- Missions21
- Miners20
- Chinese16