The Permian-Triassic boundary is generally considered to mark one of the major evolutionary crises or global mass extinction events during the history of life on earth. The erathem boundary between...
CITATION STYLE
Reinhardt, J. W. (1991). Eastern Tethyan Sponge Buildups at the Close of the Paleozoic (Uppermost Permian, Sichuan/China). In Fossil and Recent Sponges (pp. 456–464). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-75656-6_37
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