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By: Colbert, Edwin H. - Pardo, Georges.Edition:Publication info: New York, American Museum of Natural History, [1949]Volume: no.1420 (1949)Series:Holding Institution: American Museum of Natural History LibrarySubjects: Altagracia de Orituco Region Alzadasaurus tropicus Cretaceous Paleontology Plesiosauria Reptiles, Fossil South America VenezuelaBHL Collections: