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  1. By: Silfvenius, A J
    Type: Article
    In: Zeitschrift für wissenschaftliche Insektenbiologie
    Volume: 2
    Date: 1906
    Page Range: 88--98
    Publication Info: [S.l s.n 1905]-
  2. By: Silfvenius, A J
    Type: Article
    In: Acta Societatis pro Fauna et Flora Fennica
    Volume: v. 28 (1905-1906)
    Date: 1905-1906
    Page Range: 1-128
    Publication Info: Helsinki, Societas, 1875-1980