Early Pennsylvanian Xenacanth Chondrichthyans From the Swisshelm Mountains, Arizona, USA
Acta Palaeontologica Polonica - Poland
doi 10.4202/app.2008.0051
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December 1, 2009
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Polska Akademia Nauk Instytut Paleobiologii (Institute of Paleobiology, Polish Academy of Sciences)