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- Forest ecology1
- Forest reserves1
- Gas fields1
- Geological mapping1
- Geological surveys1
- Geology, Economic1
- Geomorphology1
- Hydrological stations1
- Hydrology1
- Land use1
- Landslides1
- National parks and reserves1
- Oil-shales1
- Permeability1
- Public lands1
- Quaternary Geologic Period1
- Rocks1
- Street-railroads1
- Transportation1
- Water resources development1
