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By: Klein, Carina. - Landman, Neil H.Edition:Publication info: New York, NY, American Museum of Natural History, [2019]Volume: no. 3922Series:Holding Institution: American Museum of Natural History LibrarySubjects: Ammonoidea Cretaceous Development Great Plains Mollusks, Fossil Ontogeny Paleontology Scaphites whitfieldi Variation West (U.S.)BHL Collections: