Fauna of the Vale and Choza
Subtitle: Pelycosauria : Dimetrodon
By: Everett Claire Olson --
Series: Fieldiana -- v. 10, no. 18; Chicago Natural History Museum. [Publication] -- no. 736; Publication (Chicago Natural History Museum) -- 736.
Publisher: Chicago Natural History Museum
Published: 1954
Place of publication: Chicago
Subjects: Reptiles, Fossil; Paleontology -- Permian; Paleontology -- Texas