The skull elements of the Permian Tetrapoda in the American Museum of Natural History, New York. Bulletin of the AMNH ; v. 32, article 18
American Museum of Natural History. Department of Vertebrate Paleontology. Gregory, William K. (William King), 1876-1970 Huene, Friedrich R., Freiherr von, 1875-1969
Book
1913
English
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