Subject
- Mining claims12
- Seismology12
- UT12
- Wilderness areas12
- Antiquities11
- Cycling11
- Distances11
- Postal service11
- Railroad land grants11
- Subways11
- Volcanoes11
- Water table11
- Buildings, structures, etc10
- Geomorphology10
- Health facilities10
- Military maps10
- Ore deposits10
- Slopes (Physical geography)10
- Territorial expansion10
- Territorial questions10
