Publication
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A preliminary survey of the fern flora of Penang Hill Article
Flora Malesiana Bulletin, 11(4), 293-300.January 1994
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Korte mededelingen Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 20(5/6), 142-143.January 1994
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Poa L. (Gramineae) in Malesia Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 38(2), 409-457.January 1994
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Stenocaris pontica Chappuis & Serban, 1953 und Stenocaropsis similis Cottarelli & Venanzetti, 1989 (Copepoda, Harpacticoida) aus dem Mittelmeer mit einer Revision der Gattungen Stenocaropsis Apostolov, 1982 und Stenocaris Sars, 1909 Article
Bijdragen tot de dierkunde, 64(2), 115-128.January 1994
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Willem Lodewijk van Utrecht in memoriam Article
Bulletin Zoologisch Museum, 14(5), 53-56.January 1994
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Revision of the fern genus Polypodiopteris (Polypodiaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 39(1/2), 365-371.January 1994
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A standardized description of European Sminthuridae (Collembola, Symphypleona), 2: review of four species of the genera Allacma and Spatulosminthurus Article
Bijdragen tot de dierkunde, 64(3), 151-162.January 1994
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The genus Homalocolpura Breddin and description of five new species (Hemiptera: Heteroptera: Coreidae: Colpurini) Article
Zoologische Mededelingen, 68(7), 55-72.January 1994