Publication
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List of the primary types of social wasps (Hymenoptera: Vespidae) deposited in the Nationaal Natuurhistorisch Museum, Leiden, and the Zoölogisch Museum, Amsterdam Article
Zoologische Mededelingen, 71(14), 157-169.January 1997
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Reviews Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 42(2), 406-406.January 1997
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The correct name for Archidendron clypearia (Jack) Nielsen var. casai (Blanco) Nielsen (Leguminosae-Mimosoideae) Article
Flora Malesiana Bulletin, 11(8), 515-517.January 1997
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The Prosea Programme (Plant Resources of South-East Asia) Article
Flora Malesiana Bulletin, 12(2), 45-48.January 1997
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Revision of the genus Mediocalcar (Orchidaceae) Article
Orchid Monographs, 8(1), 21-77.January 1997
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A new species and new section of Mycena from Costa Rica Article
Persoonia - Molecular Phylogeny and Evolution of Fungi, 16(3), 393-395.January 1997
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Taxonomy and biogeography of African fruit bats (Mammalia, Megachiroptera). 5. The genera Ussonycteris Andersen, 1912, Myonycteris Matschie, 1899 and Megaloglossus Pagenstecher, 1885; general remarks and conclusions; annex: key to all species Article
Beaufortia, 47(2), 11-90.January 1997
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Viscaceae Article
Flora Malesiana - Series 1, Spermatophyta, 13(1), 403-442.January 1997