Woodring, W. P. (1957). Geology and Paleontology of Canal Zone and adjoining Parts of Panama. - Geology and Description of Tertiary Mollusks (Gastropods: Trochidae to Turritellidae. Geological Survey Professional Papers. 306: 1-145.
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Woodring, W. P.
1957
Geology and Paleontology of Canal Zone and adjoining Parts of Panama. - Geology and Description of Tertiary Mollusks (Gastropods: Trochidae to Turritellidae