Olsson A.A. (1930). Contributions to the Tertiary paleontology of northern Peru: Part 3, Eocene Mollusca. Bulletins of American Paleontology. 17(62):1-96, 12 pls.
134390
Olsson A.A.
1930
Contributions to the Tertiary paleontology of northern Peru: Part 3, Eocene Mollusca