Publication
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Carex divisa Huds Article
Correspondentieblad ten dienste van de floristiek en het vegetatie-onderzoek van Nederland, 18(1), 195-195.January 1961
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An investigation of the Planktonic population of diatoms of the “ Zandkreek” during the period March 1959 to March 1960 Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 177(1), 320-326.January 1961
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On the variability of Agaon paradoxum (Dalman) Grandi and Seres armipes Waterston, with remarks on other African Agaonidae (Hymenoptera, Chalcidoidea) Article
Zoologische Mededelingen, 37(15), 231-240.January 1961
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Sur trois Psilocybe Article
Persoonia - Molecular Phylogeny and Evolution of Fungi, 2(1), 91-95.January 1961
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Two new species of Scleria Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 11(1), 219-223.January 1961
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On the vegetation of former river beds in the Netherlands Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 173(1), 1-85.January 1961
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Florae Malesianae Precursores XXIX. Supplementary notes towards the knowledge of the genus Rhododendron L. in Malaysia Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 11(1), 113-131.January 1961
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An ecological study of the vegetation in three former river beds Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 174(1), 112-162.January 1961