Publication
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The Life of Natrix vittata (L.) Article
Zoologische Mededelingen, 31(1), 1-11.January 1950
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Scientific Results of the Surinam Expedition 1948-1949 : Part II. Zoology. No. 1. Crustacea Decapoda Macrura Article
Zoologische Mededelingen, 31(3), 25-37.January 1950
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A further Note on the Canines of Celebochoerus Article
Zoologische Mededelingen, 30(21), 307-308.January 1950
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A new Trigonia from Suriname Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 105(1), 69-69.January 1950
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The marine Mollusca of the Kendeng Beds (East Java) Gastropoda Part V (Families Muricidae — Volemidae inclusive) Article
Leidse Geologische Mededelingen, 15(1), 205-240.January 1950
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On lower tertiary Mollusca from S.W. and Central Celebes Article
Leidse Geologische Mededelingen, 15(1), 282-290.January 1950
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On probably young miocene fossils from the coal concession Batoe Panggal, near Tenggarong (Samarinda), Eastern Borneo Article
Leidse Geologische Mededelingen, 15(1), 265-281.January 1950
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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