von Koenigswald, W., Widga, C., & Göhlich, U. (2023). New mammutids (Proboscidea) from the Clarendonian and Hemphillian of Oregon – a survey of Mio-Pliocene mammutids from North America. Bulletin of the Museum of Natural History, University of Oregon, 30. Retrieved from https://journals.oregondigital.org/nat_history/article/view/6004 (Original work published September 29, 2023)