Template:Örvig, 1960

• Ørvig, T. 1960. New finds of acanthodians, arthrodires, crossopterygians, ganoids and dipnoans in the upper Middle Devonian calcareous flags (oberer Plattenkalk) of the Bergisch Gladbach-Paffrath Trough. Paläontologische Zeitschrift 34(3): 295–335.  
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