biogeography of basal Ornithischia. The Mesozoic in Wyoming, Tate 2002. Casper, Wyoming: The GeologicalMuseum, Casper College. 2002: 18–34. Norman, David B.; Sues
Buchholz, P. W. Phylogeny and biogeography of basal Ornithischia. Brown, D. E. (编). The Mesozoic in Wyoming. Casper: TateGeologicalMuseum. 2002: 18–34.
biogeography of basal Ornithischia. The Mesozoic in Wyoming, Tate 2002. Casper, Wyoming: The GeologicalMuseum, Casper College. 2002: 18–34. Weishampel, David B