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Subject (Region)
- California[remove]690
- West (U.S.)689
- United States136
- Southwest, New45
- Oregon41
- Colorado35
- Utah35
- New Mexico32
- Nevada31
- Texas30
- Arizona27
- Rocky Mountains27
- Pacific States19
- Wyoming19
- San Francisco (Calif.)18
- Montana17
- West United States15
- Yellowstone National Park15
- Alaska13
- Mexico13