Mexican fossil Echini
By: by Robert Tracy Jackson
Publisher: Smithsonian Institution, U. S. National Museum
Published: 1937
Place of publication: Washington
Language: eng
Number of pages: 161
Subjects: Sea urchins, Fossil; Paleontology -- Tertiary; Paleontology -- Mexico
Other titles: Proceedings of the United States National Museum. v. 84, p. 227-237; Proceedings of the United States National Museum. no. 3015
Notes: Includes bibliographical references