Publication
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Cyanophyceae from fish-ponds in West-Java Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 8(2), 518-521.January 1957
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Revision of the Sapotaceae of the Malaysian area in a wider sense. Va. Additional notes on Manilkara Adanson Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 8(2), 204-206.January 1957
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Revision of the Sapotaceae of the Malaysian area in a wider sense. VII. Planchonella Pierre Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 8(2), 235-445.January 1957
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Revision of the Sapotaceae of the Malaysian area in a wider side. VIII. Krausella H. J. Lam Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 8(2), 446-451.January 1957
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Suriname Freshwater Snails of the Genus Pomacea Article
Studies on the Fauna of Suriname and other Guyanas, 1(1), 41-48.January 1957
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Notes on the Primates of Suriname Article
Studies on the Fauna of Suriname and other Guyanas, 1(1), 13-40.January 1957
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Observations on the Populations of Plankton and Microorganisms in an old Branch cut off from the River Waal Article
Beaufortia, 5(64), 205-221.January 1957
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Zoological Results of a Collecting Journey to Yugoslavia, 1954 5. Cyclopoida Gnathostoma (Crustacea Copepoda) Article
Beaufortia, 5(65), 223-240.January 1957