Cretaceous Thyasira from the western interior of North America
By: by Erle G. Kauffman.
Series: Smithsonian miscellaneous collections -- v. 152, no. 1; Smithsonian publication -- 4695; Publication (Smithsonian Institution) -- 4695.
Publisher: Smithsonian Institution Press
Published: 1967
Place of publication: Washington
Language: eng
Number of pages: 159
Subjects: Ammonoidea; Paleontology -- North America; Paleontology -- Cretaceous
Other titles: North American Cretaceous Thyasira
Notes: At head of title: Charles D. and Mary Vaux Walcott Research Fund.

"June 30, 1967."

Includes bibliographical references.