1. Upper Incisor Grooves in the Geomyinae
2. J. A. Allen, 1893 .Descriptions of four new species of Thomomys, with remarks on other species of the genus., Bulletin of the American Museum of Natural History, 5 :47 –67 .
3. I. S. Allison, 1966 .Fossil Lake, Oregon. Its geology and fossil faunas., Oregon State Monographs Studies in Geology, 9 :1 –48 .
4. J. J. Bachman, 1839 .The following species must be added to the list of Mr. Townsend's quadrupeds., Journal of the Academy of Natural Sciences of Philadelphia, 8 :101 –105 .
5. Revision of the Pocket Gophers of the Genus Thomomys