Publication
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Activity of the thyroid and the pituitary gland in the viviparous Cyprinodonts Lebistes reticulatus (Peters), Xiphophorus helleri Heckel and Xiphophorus maculatus Günther during the development of the gonopodium Article
Bijdragen tot de dierkunde, 29(1), 41-70.January 1959
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Mammalian Remains from Indian Sites on Aruba Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 154-157.January 1960
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Thymelaeaceae Article
Flora Malesiana - Series 1, Spermatophyta, 6(1), 1-48.January 1960
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The Heteroptera of the Netherlands Antilles – II Hebridae Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 11(1), 35-43.January 1960
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Notostraca from the Netherlands Antilles with notes on the Segmentation of the Group Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 18-32.January 1960
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Anthicid Beetles from Venezuela, Colombia, Cuba, and the Netherlands Antilles Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 64-71.January 1960
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A new species of the Rodent Baiomys from Aruba and Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 33-40.January 1960
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Turbellaria from Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 10(1), 41-51.January 1960