Publication
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Xeniidae (Cnidaria: Octocorallia) from the Red Sea, with the description of a new species Article
Zoologische Mededelingen, 64(9), 113-120.January 1990
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Sexual strategies in the newts Triturus cristatus and Triturus marmoratus Article
Bijdragen tot de dierkunde, 60(1), 51-64.January 1990
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Genetic differentiation, origin and dispersal of Gammarus gauthieri from the Iberian peninsula and North Africa (Crustacea, Amphipoda) Article
Bijdragen tot de dierkunde, 60(1), 31-49.January 1990
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Review Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 232-232.January 1990
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A catalogue of the genera of the Vespidae (Hymenoptera) Article
Zoologische Verhandelingen, 260(1), 1-62.January 1990
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Excursie IJsselakademie Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 16(3), 90-90.January 1990
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Laophontopsis Sars and the taxonomic concept of the Normanellinae (Copepoda: Harpacticoida): A revision Article
Bijdragen tot de dierkunde, 59(4), 203-227.January 1990
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The status of Carissa laxiflora Benth. and Carissa papuana Markgraf (Apocynaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 263-264.January 1990