Publication
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The identity of Plectomirtha Oliv. with Pennantia J. R. & G. Forster (Icacinaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 18(1), 217-218.January 1970
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Additional notes on Lepisanthes (Sapindaceae) Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 18(2), 429-430.January 1970
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Review Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 18(1), 64-64.January 1970
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Kleine dieren uit het zoete water van Suriname : Verslag van een onderzoek in 1967 Article
Zoologische Bijdragen, 12(1), 3-46.January 1970
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Chemical petrology of polymetamorphic ultramafic rocks from Galicia, NW Spain Article
Leidse Geologische Mededelingen, 45(1), 237-281.January 1970
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Revision der Gattung Glycyphana Burmeister (Coleoptera, Cetoniinae) I. Teil Article
Zoologische Verhandelingen, 107(1), 1-112.January 1970
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Systematics, zoogeography, and ecology of the Priapulida Article
Zoologische Verhandelingen, 112(1), 1-118.January 1970
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Birds of the Inyanga National Park, Rhodesia Article
Zoologische Verhandelingen, 109(1), 1-74.January 1970