Permian Gastropoda of the southwestern United States.
By: Ellis L. Yochelson.
Contributors: American Museum of Natural History.
Series: Bulletin of the American Museum of Natural History -- v. 119, article 4
Publisher: American Museum of Natural History
Published: 1960
Place of publication: New York
Language: eng
Number of pages: 293
Subjects: Gastropoda, Fossil -- Southwest, New.; Paleontology -- Permian.; Paleontology -- Southwest, New.
Notes: "With notes on Pennsylvanian Bellerophontacea."

Includes bibliographical references.