бочки с флагом судана. производство нефти или торговля в судане концепция 3d. добыча нефти или торговля в судане концепция 3d, изолированная на белом фоне.

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exploration extraction and price fluctuations of canadian sudanese oil in the context geopolitical cooperation or conflict energy

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the complex relationship between south sudan and opec and its implications for the global oil industry illustrated with the south

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