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Sch, E., Weidner, H. & Jahn, E. Berichte. Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 53, 28–32 (1980). https://doi.org/10.1007/BF01988718
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DOI: https://doi.org/10.1007/BF01988718