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Subject
- Upper mantle project8
- Discovery and exploration3
- Indians of North America3
- Geology2
- Geomagnetism2
- Geophysics2
- Glacial landforms2
- Gravity anomalies2
- Confectioners1
- Discoveries in geography1
- Glacial lakes1
- History1
- Indian reservations1
- Land use1
- Military bases1
- Physical geography1
- Roads1
- Soil moisture1
- Soil permeability1
- Soils1
