Publication
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A first contribution to our knowledge of the flora of the Talaud Islands and Morotai Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 5(1), 93-256.January 1942
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Novitates Taxonomicae III. ex. Herbario Academiae Rheno-Traiectinae Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 79(1), 279-292.January 1942
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On the supposed hexaprotodont milk dentition in Hippopotamus amphibius L. Article
Zoologische Mededelingen, 24(8), 187-196.January 1942
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On a grooved pentagonal Dodecahedron of pyrite Article
Leidse Geologische Mededelingen, 13(1), 70-75.January 1942
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Das Schichtungsproblem, ein Beitrag aus den Turiner Bergen („Colli Torinesi”) Article
Leidse Geologische Mededelingen, 13(1), 39-62.January 1942
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Revision of the Penard oölogical collection from Surinam Article
Zoologische Mededelingen, 24(10), 240-275.January 1942
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Revision of the Erotylidae (Coleoptera) of the Leiden Museum Article
Zoologische Mededelingen, 24(3), 49-115.January 1942
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On the Arrangement of the scales on the dorsal surface of the digits in Lygosoma and allied genera Article
Zoologische Mededelingen, 24(6), 153-158.January 1942