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  1. By: Contreras-Lichtenberg, Ruth,
    Type: Article
    In: Spixiana
    Volume: 5
    Date: 1982
    Page Range: 175--180
    Publication Info: Mchen, Zoologische Staatssammlung Mchen,
  2. By: Avellanal, Maria H. - Jaramillo, E - Clasing, Elena, - Quijón, Pedro - Contreras-Lichtenberg, Ruth,
    Type: Article
    In: The veliger
    Volume: 45
    Date: 2002
    Page Range: 33--44
    Publication Info: Berkeley, CA, California Malacozoological Society,
  3. By: Contreras-Lichtenberg, Ruth,
    Type: Article
    In: Spixiana
    Volume: 14
    Date: 1988
    Page Range: 101--104
    Publication Info: München, Zoologische Staatssammlung München,