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Assessment of undiscovered oil and gas resources of the Sud Province, north-central Africa
- [Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey, 
Title from title screen (viewed on June 24, 2011). At head of title: World Petroleum Resources Project. "March 2011."
- Africa, North and Africa, Central
- Petroleum reserves—Africa, North, Natural gas—Africa, North, Petroleum reserves—Africa, Central, and Natural gas—Africa, Central
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