Jurassic (Oxfordian and Late Callovian) ammonites from the western interior region of the United States
By: by Ralph W. Imlay.
Series: Geological Survey professional paper ;; 1232
Publisher: U.S. G.P.O.
Published: 1982
Place of publication: Washington
Language: eng
Number of pages: 44
Subjects: Ammonoidea -- West (U.S.); Paleontology -- Jurassic.; Paleontology -- West (U.S.)
Notes: Bibliography: p. 41-42.
Includes index.