A ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of west Siberia, Russia and its phylogenetic relationships

A. O. Averianov, A. V. Voronkevich, S. V. Lechchinskiy, and A. Fayngertz

2006

Article

Journal of Systematic Palaeontology 4(4):359-395

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