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By: Colbert, Edwin H. - Witter, Robert V.Edition:Publication info: New York, N.Y, American Museum of Natural History, [1955]Volume: no. 1740Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.79,5T:14.02 Amphibians Amphibians, Fossil Anatomy Evolution Paleontology Permian Scales (Reptiles) Skin Texas TrimerorhachisBHL Collections: