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Anchor text: Geological structure of Shtokman field (in Russian)

Wikipedia: Shtokman field

Anchor text: Geological structure of Chunxiao gas field (in Russian)

Wikipedia: Chunxiao gas field

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Wikipedia: Kovykta field

Anchor text: Geological structure of Platong gas field (in Russian)

Wikipedia: Platong gas field

Anchor text: Geological structure of the Chayanda field (in russian:Геологическое строение Чаяндинского ГКМ)

Wikipedia: Chayanda field