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Subject
- Geology36
- Coal29
- Land use, Rural24
- Fire risk assessment21
- Mines and mineral resources19
- Real property16
- Indian reservations7
- Roads5
- Forest reserves4
- Geomagnetism4
- Water resources development3
- Description and travel2
- Geology, Stratigraphic2
- Magnetic anomalies2
- Cartes1
- Cities and towns1
- Coal mines and mining1
- Coal reserves1
- Faults (Geology)1
- Forests and forestry1
