Publication
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A new species of the genus Rivulus from Ecuador with additional records of Rivulus from the Upper Amazon and Ucayali rivers Article
Beaufortia, 9(103), 145-150.January 1962
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Ostroumovia inkermanica in the Netherlands Article
Beaufortia, 9(100), 117-120.January 1962
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Project Pacific Plant Areas Article
Flora Malesiana Bulletin, 17(1), 900-902.January 1962
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An annotated list of Myxomycetes found in the Netherlands. Additions and emendations I Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 182(1), 35-36.January 1962
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Some Caribbean Coleoptera Cerambycidae Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 18(1), 75-102.January 1963
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Ophiuroidea of the Lesser Antilles Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 15(1), 24-50.January 1963
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Shallow water Holothurians known from the Caribbean waters Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 14(1), 100-118.January 1963
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Karibische Landmilben – I. Uropodina Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 16(1), 1-58.January 1963