Publication
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Notes on Sacculinidae, chiefly in the collection of the United States National Museum Article
Zoologische Verhandelingen, 7(1), 1-55.January 1950
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The genus Onchocalanus G.O. sars, 1905 (Crustacea Copepoda) Article
Zoologische Verhandelingen, 10(1), 1-35.January 1950
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Further Notes on the Ampullae of Millepora Article
Zoologische Mededelingen, 31(5), 49-61.January 1950
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On some brackish Water Mollusca from the Lake of Maracaibo Article
Zoologische Mededelingen, 31(8), 79-87.January 1950
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The shifting of the molar row with regard to the orbit in Equus and Giraffa Article
Zoologische Mededelingen, 30(23), 311-326.January 1950
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Gustav Albert Stiasny Article
Zoologische Mededelingen, 30(16), 257-267.January 1950
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The Anatomy of Natrix vittata (L.) Article
Zoologische Mededelingen, 31(2), 13-24.January 1950
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Review Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 6(2), 544-545.January 1950