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Subject (Region)
- California4
- North Dakota4
- South Dakota4
- Texas4
- United States4
- Arizona3
- New Mexico3
- Alaska2
- Batesland (S.D.)2
- Beaumont (Tex.)2
- Black Elk Peak (S.D.)2
- Black Hills (S.D. and Wyo.)2
- Edgewood (N.M.)2
- Glen Canyon Dam (Ariz.)2
- Interior (S.D.)2
- Kayenta (Ariz.)2
- Kyle (S.D.)2
- Navajo Nation, Arizona, New Mexico & Utah2
- Nebraska2
- Oglala (S.D.)2