Publication
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Les porphyres Luganois et leurs enveloppes. L’histoire géologique des Alpes Tessinoises entre Lugano et Varese Article
Leidse Geologische Mededelingen, 11(1), 1-61.January 1939
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De atollen en barrière-riffen der Togian-eilanden Article
Leidse Geologische Mededelingen, 11(1), 132-187.January 1939
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Ecological observations on the Genus Pleiocraterium in Gajoland, Sumatra Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 57(1), 446-448.January 1939
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Snakes from the Leeward Group, Venezuela and eastern Colombia Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 2(1), 115-137.January 1940
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A survey of the mammals, lizards and mollusks Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 1(1), 59-108.January 1940
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A New fresh-water Isopod from Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 2(1), 147-150.January 1940
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Some galls from the island of Enggano Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 3(3), 405-410.January 1940
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Notes on the nomenclature of some grasses Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 3(3), 411-480.January 1940