The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
- Groves, Colin, and Peter Grubb. 2011. Ungulate Taxonomy. ix + 317
- M. F. Skinner and C. W. Hibbard. 1972. Early Pleistocene pre-glacial and glacial rocks and faunas of north-central Nebraska. Bulletin of the American Museum of Natural History 148(1):1-148