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  1. By: Sich, Alfred
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 18
    Date: 1906
    Page Range: 283--288
    Publication Info: [London s.n
  2. By: Sich, Alfred
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 20
    Date: 1908
    Page Range: 248--252
    Publication Info: [London s.n