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Subject (Region)
- United States35
- Utah17
- West (U.S.)16
- Alaska9
- Arizona4
- California4
- Idaho4
- Montana4
- Colorado River (Colo.-Mexico)3
- Four Corners Region3
- North America3
- Arctic National Wildlife Refuge2
- Arctic National Wildlife Refuge (Alaska)2
- Arctic regions2
- Bear River Migratory Bird Refuge (Utah)2
- Colorado Plateau2
- Denali National Park and Preserve2
- Denali National Park and Preserve (Alaska)2
- Grand Canyon2
- Grand Canyon (Ariz.)2