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- Ice 2
- Rocks 2
- Snow 2
- Three Sisters (Or.) 2
- Forests and forestry 1
- Glacial crevasses 1
- Graminaceae 1
- Ice fields 1
- Lakes 1
- Landscapes 1
- Mountains 1
- Mountains--Oregon 1
- Nature 1
- Three Sisters Wilderness (Or.) 1
- Trees 1
