| Shotwell J. A. (1958) Inter-community relationships in Hemphillian (mid-Pliocene) mammals, Ecology 39 2, 271-282 |
| Black C. C. (1963) A review of the North American Tertiary Sciuridae, Bulletin of the Museum of Comparative Zoology 130 3, 109-248 |
| Hirschfeld S. E., Webb S. D. (1968) Plio-Pleistocene Megalonychid Sloths of North America, Bulletin of the Florida State Museum 12 5 |
| Hutchison J. H. (1968) Fossil Talpidae (Insectivora, Mammalia) from the Tertiary of Oregon, Bulletin of the Museum of Natural History, University of Oregon 11, 1-117 |
| Wagner H. (1976) A new species of Pliotaxidea (Mustelidae; Carnivora) from California, Journal of Paleontology 50 1, 107-127 |
| Gustafson E. P. (1978) The Vertebrate Faunas of the Pliocene Ringold Formation, South-Central Washington, Bulletin of the Museum of Natural History, University of Oregon 23, 1-62 |
| Harrison J. A. (1981) A review of the extinct wolverine, Plesiogulo (Carnivora: Mustelidae), from North America, Smithsonian Contributions to Paleobiology 46, 1-27 |
| Martin J. E. (1984) A Survey of Tertiary Species of Perognathus (Perognathinae) and a description of a new genus of Heteromyinae,, Carnegie Museum of Natural History Special Publication 9, 90-121 |
| White J. A. (1988) The Archaeolaginae (Mammalia, Lagomorpha) of North America, Excluding Archaeolagus and Panolax, Journal of Vertebrate Paleontology 7 4, 425-450 |
| Martin J. E. (1998) Two new sciurids, Eutamias malloryi and Parapaenemarmota (Rodentia), from the late Miocene (Hemphillian) of northern Oregon, Thomas Burke Memorial Washington State Museum Research Report 6, 31-42 |
| Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals |
