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  1. By: Boettger, Oskar
    Type: Article
    In: Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft.
    Volume: 13
    Date: 1883
    Page Range: 93--146
    Publication info: Frankfurt am Main :Waldemar Kramer [etc.]
  2. By: Boettger, Oskar
    Type: Article
    In: Zoologischer Anzeiger.
    Volume: 14
    Date: 1891
    Page Range: 343--347
    Publication info: Jena,VEB Gustav Fischer Verlag.