Publication
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Two more Menkia species (Mollusca: Gastropoda Prosobranchia: Aciculidae) Article
Zoologische Mededelingen, 65(18), 251-255.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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Whale-lice (Amphipoda: Cyamidae) recorded from The Netherlands Article
Zoologische Mededelingen, 65(29), 393-405.January 1991
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Moerasmelkdistel (Sonchus palustris L.) en Grote engelwortel (Angelica archangelica L.) langs het Twentekanaal: indicatoren van gebiedsvreemd water Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 17(6), 138-148.January 1991
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Annotated Catalogue of recent echinoderm type specimen in the collection of the Zoölogisch Museum Amsterdam Article
Bulletin Zoologisch Museum, 13(4), 25-56.January 1991
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The genus Nervilia (Orchidaceae) in Africa and the Arabian Peninsula Article
Orchid Monographs, 5(1), 1-68.January 1991
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A contribution to the knowledge of the pectinacean Mollusca (Bivalvia: Propeamussiidae, Entoliidae, Pectinidae) from the Indonesian Archipelago Article
Zoologische Verhandelingen, 271(1), 1-54.January 1991
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A new genus of Braconinae with depressed ovipositor-tip from the Oriental region (Hymenoptera: Braconidae) Article
Zoologische Mededelingen, 65(13), 199-202.January 1991