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Woodring, W. P. (1982). Geology and paleontology of Canal Zone and adjoining parts of Panama. Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae; additions to families covered in P 306-E; additions to gastropods; cephalopods). United States Geological Survey Professional Paper. 306-F: 541-759, pls. 83-124.
Woodring, W. P. (1982). Geology and paleontology of Canal Zone and adjoining parts of Panama. Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae; additions to families covered in P 306-E; additions to gastropods; cephalopods). United States Geological Survey Professional Paper. 306-F: 541-759, pls. 83-124.