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  1. By: Ghiselin, Michael T., - Demange, Jean-Marie - Wourms, John P.
    Type: Article
    In: The veliger
    Volume: 18
    Date: 1975
    Page Range: 40--43
    Publication Info: Berkeley, CA, California Malacozoological Society,
  2. By: Cohen, Daniel M. - Wourms, John P.
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 89
    Date: 1976
    Page Range: 81--98
    Publication Info: Washington, Biological Society of Washington,