Woodring, W. P. (1973). Geology and paleontology of the Canal Zone and adjacent parts of Panama: description of Tertiary mollusks (additions to gastropods, scaphopods, pelecypods: Nuculidae to Malleidae). United States Geological Survey Professional Paper. 306-E: 453-539.
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Woodring, W. P.
1973
Geology and paleontology of the Canal Zone and adjacent parts of Panama: description of Tertiary mollusks (additions to gastropods, scaphopods, pelecypods: Nuculidae to Malleidae)
United States Geological Survey Professional Paper