Publication
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Les roches basiques et ultrabasiques des Lacs Robert et le Trias de Chamrousse (Massif de Belledonne) Etude petrologique et geologique Article
Leidse Geologische Mededelingen, 15(1), 1-204.January 1950
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On quaternary Mollusca from the islands of Boenjoe and Tarakan, E. Borneo Article
Leidse Geologische Mededelingen, 15(1), 241-264.January 1950
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Address delivered on occasion of the 133rd anniversary of the Kebun Raya Indonesia, on May 17, 1950, by the Director of the Botanic Gardens of Indonesia Ir Kusnoto Article
Flora Malesiana Bulletin, 7(1), 184-185.January 1950
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Madagascar and new Caledonia. A problem in plant geography Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 470-479.January 1950
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Monograph on the Foraminifera of the type-locality of the Maestrichtian (South-Limburg, Netherlands) Article
Leidse Geologische Mededelingen, 16(1), 197-331.January 1951
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The geology of the Dalskog Dals-Rostock region Dalsland, Sweden Article
Leidse Geologische Mededelingen, 16(1), 56-195.January 1951
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La géologie du massif de Gigondas Article
Leidse Geologische Mededelingen, 16(1), 1-55.January 1951
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Some nomenclatorial corrections to 'Investigations on Stylasteridae (Hydrocorals)' 1942 Article
Zoologische Mededelingen, 31(12), 125-127.January 1951