Publication
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Origin of the Stephanian Red Beds in the Ocejo Basin (Prov. of Leon, Spain) Article
Leidse Geologische Mededelingen, 28(1), 377-387.January 1963
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Metamorphic history of the Central Pyrenees Part II, Valle de Arán, Sheet 4 Article
Leidse Geologische Mededelingen, 28(1), 321-376.January 1963
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Dates of publication and bibliographical notes Article
Flora Malesiana Bulletin, 18(1), 1011-1016.January 1963
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Cytological observations in relation to the taxonomy of the Orchids of the Netherlands Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 195(1), 172-194.January 1963
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A study of the Levantine and Pontic Harpacticoida (Crustacea, Copepoda) Article
Zoologische Verhandelingen, 64(1), 1-128.January 1964
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The petrology of the Region between Lage and Carballo (NW Galicia, NW Spain) Article
Leidse Geologische Mededelingen, 30(1), 103-120.January 1964
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Zur Kenntnis der Gyriniden (Col.) von Suriname und vom Rio Parú im benachbarten Brasilien Article
Studies on the Fauna of Suriname and other Guyanas, 7(1), 82-110.January 1964
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A new Dragon Fly of the genus Rhodopygia Article
Studies on the Fauna of Suriname and other Guyanas, 7(1), 48-55.January 1964