Publication
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Itinerary in Kenya colony and the union of South America Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 7(1), 297-302.January 1952
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A monograph of the Vochysiaceae. II. Callisthene Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 108(1), 222-242.January 1952
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Notes on the Ichthyology of Surinam (Dutch Guiana). 2. The Surinam representatives of Gasteropelecus and Carnegiella, with remarks on the tribe Gasteropelecidi Article
Beaufortia, 2(20), 1-16.January 1952
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Protium Burman f Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 7(1), 154-160.January 1952
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Hymenosporum in New Guinea (Pittosporaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 7(1), 292-292.January 1952
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Obituary Dr A. W. Kloos (1880—1952) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 7(1), 303-304.January 1952
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A monograph of the genus Isonandra Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(3), 547-579.January 1952
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Late-glacial flora and periglacial phenomena in the Netherlands Article
Leidse Geologische Mededelingen, 17(1), 71-183.January 1952