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Subject
- Oil fields[remove]11
- Gas fields8
- Petroleum pipelines6
- Petroleum refineries6
- Maps5
- Petroleum shipping terminals5
- Gas pipelines3
- Economic conditions2
- Natural gas pipelines2
- Oil and gas leases2
- Pipelines2
- Population2
- Administrative and political divisions1
- Boundaries1
- Languages1
- Mines and mineral resources1
- Natural gas1
- Petroleum1
- Phytogeography1
- Tribes1
