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Category:Natural_gas_fields_in_Poland?oldid=550202521
Category:Natural_gas_fields_in_Poland?oldid=550202521
http://en.wikipedia.org/wiki/Category:Natural_gas_fields_in_Poland?oldid=550202521
Natural gas fields in Poland
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Category:Natural_gas_fields_in_Poland?oldid=550202521
http://en.wikipedia.org/wiki/Category:Natural_gas_fields_in_Poland?oldid=550202521