Publication
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Massaal optreden Pieris brassicae L. in 1950. Article
Entomologische Berichten, 13(311), 261-261.January 1951
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Knijten. Article
Entomologische Berichten, 13(311), 261-261.January 1951
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De generieke nomenclatuur van onze Kleine Wapendragers Article
Entomologische Berichten, 13(311), 262-265.January 1951
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Nymphalis io L., tweede generatie. Article
Entomologische Berichten, 13(311), 265-265.January 1951
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Late Nymphalis io L. Article
Entomologische Berichten, 13(311), 265-265.January 1951
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The genus Tectoporus Carl (Diplopoda, Polydesmoidea, Strongylosomidae) Article
Entomologische Berichten, 13(311), 266-271.January 1951
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Overwintering van de pop van Lasiocampa quercus L. Article
Entomologische Berichten, 13(311), 271-271.January 1951
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Clubiona germanica Thorell 1870 (Araneae, Clubionidae), f.n.sp. Article
Entomologische Berichten, 13(311), 272-272.January 1951