Fauna of the Vale and Choza
Subtitle: a new Trematopsid amphibian from the Vale formation
By: Everett Claire Olson --
Series: Fieldiana -- v. 10, no. 26; Chicago Natural History Museum. [Publication] -- no. 796; Publication (Chicago Natural History Museum) -- 796.
Publisher: Chicago Natural History Museum
Published: 1956
Place of publication: Chicago
Subjects: Amphibians, Fossil; Paleontology -- Permian; Paleontology -- Texas