Publication
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Pliocene Mollusca from a coral limestone of a hill near Sekoerau, E. Borneo Article
Leidse Geologische Mededelingen, 15(1), 305-318.January 1950
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On quaternary Mollusca from the islands of Boenjoe and Tarakan, E. Borneo Article
Leidse Geologische Mededelingen, 15(1), 241-264.January 1950
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Revision of the Lycoperdaceae of the Netherlands Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 480-516.January 1950
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Wood-anatomy and relationship. Taxonomic Notes in connection with the Key to the Javanese Woods Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 407-461.January 1950
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Nomenclatural changes in Spilanthes and Blainvillea with remarks and a key to the species of Spilanthes in the Malay Archipelago Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 349-354.January 1950
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Notes on the Flora of Java, V. Identification of the new species and combinations proposed by C. P. Thunberg in the Florula Javanica by L. Winberg and F. O. Widmark (1825) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 358-362.January 1950
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The Algae transported on drifting objects and washed ashore on the Netherlands coast Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 527-543.January 1950
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Notes on the Flora of Java, VI Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 363-406.January 1950