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Stratigraphic chart of the lower Permian (partial) Content updated October 16, 2005
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ARCHERIA References
Chronological: A. S. Romer (1947) "Review of the Labyrinthodontia". Bulletin of the Museum of Comparative Zoology, Harvard College, 99: 1 - 368. H. Heatwole, R. L. Carroll (2000) "Amphibian Biology, Volume 4 Palaeontology" Surrey Beatty & Sons: 973 - 1496 |