Não informado. Oil and Gas Investigations. State Geological Survey.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Oil and Gas Investigations. Lawrence, Kan: State Geological Survey.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Oil and Gas Investigations. State Geological Survey.
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