Bowring, S. A., Erwin, D. H., & Isozaki, Y. (1999). The tempo of mass extinction and recovery: The end-Permian example. The National Academy of Sciences.
Čikaški stil citiranjaBowring, Samuel A., Douglas H. Erwin, i Yukio Isozaki. The Tempo of Mass Extinction and Recovery: The End-Permian Example. The National Academy of Sciences, 1999.
MLA način citiranjaBowring, Samuel A., Douglas H. Erwin, i Yukio Isozaki. The Tempo of Mass Extinction and Recovery: The End-Permian Example. The National Academy of Sciences, 1999.
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