Publication
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Notes on the Fresh-water Polychaete Lycastopsis from Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 58-63.January 1960
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The Heteroptera of the Netherlands Antilles – I Foreword Gerridae, Veliidae, Mesoveliidae (Water Striders) Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 11(1), 1-34.January 1960
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The Fresh-water Fishes of the Island of Trinidad Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 72-153.January 1960
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The Heteroptera of the Netherlands Antilles – III Saldidae (Shore Bugs) Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 11(1), 44-61.January 1960
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Revision of the Sapotaceae of the Malaysian area in a wider sense. XXIII. Palaquium Blanco Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 10(2), 432-606.January 1960
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Mosses of d’Entrecasteaux group & Louisiade Archipelago, Papua, New Guinea Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 10(1), 142-150.January 1960
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New Bornean Acanthaceae Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 10(1), 151-175.January 1960
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Revision of Abrus Adanson (Pap.) with special reference to Africa Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 10(2), 607-624.January 1960