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First Finding of Archaeopteridaceae Wood in the Upper Devonian Deposits of the Middle Timan Region

Moscow University Geology Bulletin, 2011
N V Gordenko, O A Orlova
exaly  

Hydrocarbon Potential of Middle and Upper Devonian Coals From Melville Island, Arctic Canada

Organic Geochemistry, 1991
Thomas Gentzis, Fariborz Goodarzi
exaly  

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