James Ian Kirkland: A new hadrosaurid from the upper Cedar Mountain Formation (Albian-Cenomanian: Cretaceous) of eastern Utah – the oldest known hadrosaurid (lambeosaurine?) In: Spencer G. Lucas, James I. Kirkland, John W. Estep (Hrsg.): Lower and Middle Cretaceous terrestrial ecosystems (= New Mexico Museum of Natural History and Science. Bulletin. Bd. 14, ISSN1524-4156). New Mexico Museum of Natural History and Science, Albuquerque NM 1998, S. 283–295, online.
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James Ian Kirkland: A new hadrosaurid from the upper Cedar Mountain Formation (Albian-Cenomanian: Cretaceous) of eastern Utah – the oldest known hadrosaurid (lambeosaurine?) In: Spencer G. Lucas, James I. Kirkland, John W. Estep (Hrsg.): Lower and Middle Cretaceous terrestrial ecosystems (= New Mexico Museum of Natural History and Science. Bulletin. Bd. 14, ISSN1524-4156). New Mexico Museum of Natural History and Science, Albuquerque NM 1998, S. 283–295, online.