Revised classification of Pteraspididae with description of new forms from Wyoming
By: [by] Robert H. Denison --
Series: Fieldiana -- v. 20, no. 1; [Field Museum of Natural History, Chicago] Publication -- 1106; Publication (Field Museum of Natural History) -- 1106.
Publisher: Field Museum of Natural History
Published: 1970
Place of publication: Chicago
Subjects: Pteraspididae.; Paleontology -- Devonian.; Paleontology -- Wyoming.
Other titles: Pteraspididae