Ordovician vertebrates from Western United States
By: Robert H. Denison --
Series: Fieldiana -- v. 16, no. 6; [Field Museum of Natural History, Chicago. Publication] -- no. 1034; Publication (Field Museum of Natural History) -- 1034.
Publisher: Field Museum of Natural History
Published: 1967
Place of publication: [Chicago]
Subjects: Vertebrates, Fossil -- West (U.S.); Paleontology -- Ordovician.; Paleontology -- West (U.S.)
Other titles: Ordovician vertebrates