Publication
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New Records of Ticks from the Lesser Antilles Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 28(1), 126-134.January 1969
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Caribbean Bomolochidae (Copepoda: Cyclopoida) Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 28(1), 1-125.January 1969
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The marine mollusca of Suriname (Dutch Guiana) holocene and recent Part 1. General Introduction Article
Zoologische Verhandelingen, 101(1), 1-49.January 1969
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Studies on the land molluscs of Zululand Article
Zoologische Verhandelingen, 103(1), 1-116.January 1969
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Die Anomuren des Roten Meeres (Crustacea Decapoda: Paguridea, Galatheidea, Hippidea) 1) Article
Zoologische Verhandelingen, 104(1), 1-210.January 1969
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A reclassification of the species of Linyphia latreille based on the functioning of the genitalia (Araneida, Linyphiidae) Part I. Linyphia Latreille and Neriene Blackwall Article
Zoologische Verhandelingen, 105(1), 1-302.January 1969
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On two hollinid ostracode genera from the Upper Carboniferous of Northwestern Spain Article
Leidse Geologische Mededelingen, 43(1), 157-190.January 1969
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Fossil non-calcareous Algae from insoluble residues of algal limestones Article
Leidse Geologische Mededelingen, 44(1), 235-239.January 1969