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  1. By: Drensky, P
    Type: Article
    In: Entomologische Rundschau
    Volume: 28
    Date: 1911
    Page Range: 41--43
    Publication Info: Stuttgart, A. Kernen, 1909-
  2. By: Drensky, P
    Type: Article
    In: Известия на Царските природонаучни институти в София = Izvestiia na Tsarskitia prirodonauchni instituti v Sofiia
    Volume: 15
    Date: 1942
    Page Range: 33--60
    Publication Info: Sofiia Pechatnitsa P. Glushkov 1928-