New reptiles and stegocephalians from the Upper Triassic of western Texas Case, E. C. (Ermine Cowles), 1871-1953 creator text book Washington Carnegie Institution of Washington 1922 1922
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ENG Labyrinthodontia Paleontology Reptiles, Fossil Texas Triassic QE861 C37 Carnegie Institution of Washington publication, 321 https://www.biodiversitylibrary.org/bibliography/32760 10.5962/bhl.title.32760 OTU