Publication
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Accuracy and common sense in plant descriptions Article
Flora Malesiana Bulletin, 19(1), 1135-1138.January 1964
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La metamorphose des cypris femelles des Rhizocephales Article
Zoologische Mededelingen, 39(54), 573-576.January 1964
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Jottings on protective colour in animals Article
Zoologische Mededelingen, 39(47), 479-480.January 1964
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Die Euphthiracaridae Jacot, 1930, und Ihre Gattungen (Acari, Oribatei) Article
Zoologische Verhandelingen, 67(1), 1-78.January 1964
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Foraminifera from the tidal zone in the Netherlands Antilles and other West Indian Islands Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 21(1), 1-119.January 1964
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On the genus Therioaphis walker, 1870 with descriptions of new species (Homoptera, Aphididae) Article
Zoologische Verhandelingen, 68(1), 1-47.January 1964
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Editorial Article
Flora Malesiana Bulletin, 19(1), 1100-1103.January 1964
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The Fresh-Water Fishes of the Island of Trinidad: addenda, errata et corrigenda Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 20(1), 52-57.January 1964