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  1. By: Blum, Isaak,
    Publication info: Frankfurt am Main, [s.n, 1888?]
    Holding Institution: Smithsonian Libraries and Archives
  1. By: Blum, Isaak,
    Type: Article
    In: Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft
    Volume: 15
    Date: 1883
    Page Range: 162--163
    Publication Info: Frankfurt am Main Verlag W. Küchler [1868]-1919
  2. By: Blum, Isaak,
    Type: Article
    In: Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft
    Volume: 20
    Date: 1888
    Page Range: 138--140
    Publication Info: Frankfurt am Main Verlag W. Küchler [1868]-1919