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Subject
- Land use, Rural115
- Mines and mineral resources52
- Geology13
- Roads8
- Humanitarian assistance7
- Return migration5
- Administrative and political divisions4
- Health facilities4
- Central business districts2
- Forest reserves2
- Geology, Structural2
- History2
- Land use2
- Oil fields2
- Phytogeography2
- Public lands2
- Wilderness areas2
- Administrative agencies1
- Agricultural pollution1
- Animals, Fossil1
