New American Paleozoic echinoids.
Series: Smithsonian miscellaneous collections -- v. 135, no. 9
Publisher: Smithsonian Institution
Published: 1958
Place of publication: Washington
Language: eng
Number of pages: 26
Subjects: Sea urchins, Fossil.; Paleontology -- Paleozoic.; Paleontology -- America.
Notes: Smithsonian Institution. Publication 4337.

At head of title: Charles D. and Mary Vaux Walcott Research Fund.

Bibliography: p. 23-24.