Publication
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Coralliomyzontidae, Fam. n. (Copepoda: Siphonostomatoida), associated with Scleractinian corals in Madagascar Article
Bulletin Zoologisch Museum, 13(3), 17-24.January 1991
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Review Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(2), 546-546.January 1991
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Boekaankondigingen Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 17(5), 128-130.January 1991
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Revision of the genera of the Afrotropical and W. Palaearctic Rogadinae Foerster (Hymenoptera: Braconidae) Article
Zoologische Verhandelingen, 273(1), 1-101.January 1991
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The Malesian species of Sarcopteryx Radlk. (Sapindaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 36(1), 87-103.January 1991
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Studies in Malesian Vitaceae X. Two new species of Tetrastigma from Borneo Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(2), 559-564.January 1991
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Professor Kalkman retires Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(2), 277-278.January 1991
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Boekaankondigingen Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 17(3/4), 72-72.January 1991