Publication
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On the systematic position of the Western Hamster, Cricetus cricetus canescens Nehring (Mammalia: Rodentia) Article
Bijdragen tot de dierkunde, 29(1), 187-201.January 1959
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Outbreaks of the Tentcaterpillar (Malacosoma neustria L.) on elm trees in Amsterdam and the efforts to control them with derris-powder Article
Bijdragen tot de dierkunde, 29(1), 105-119.January 1959
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Further records and descriptions of Bactra species (Lepidoptera, Tortricidae), chiefly in Dr. H.G. Amsel collection Article
Bijdragen tot de dierkunde, 29(1), 173-186.January 1959
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The differentiation within the genus Chamaeleo Laurenti, 1768 Article
Beaufortia, 8(89), 1-92.January 1959
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Pollen-gram size and its value in Palynology Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 156(1), 369-371.January 1959
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Parnassiana nova : XXVII. Nachträgliche Betrachtungen zu der Revision der Subfamilia Parnassiinae Article
Zoologische Mededelingen, 36(20), 289-297.January 1959
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Regional floras, a significant modern trend in plant taxonomy Article
Flora Malesiana Bulletin, 14(1), 646-652.January 1959
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Cyatheaceae Article
Flora Malesiana - Series 2, Pteridophyta, 1(1), 65-176.January 1959