1. The new evolution; zoogenesis, by Austin H. Clark ...
2. Distributional and phylogenetic studies on Indian fossil mammals. V. The classification and the phylogeny of the Giraffidae;Colbert;Am. Museum Novitates.,1935
3. On the extinct species of Rhinoceridae of North America and their allies;Cope;U.S. Geol. Geog. Survey Terr. Bull,1879
4. The genealogy of American rhinoceroses;Cope;Am. Naturalist.,1880