Publication
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Notes on the types of Gnathoclita vorax (Stoll) (Tettigoniidae, Pteropphyllinae) Article
Zoologische Mededelingen, 45(26), 303-311.January 1971
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The status of Vespertilio brachypterus Temminck, 1840 (Chiroptera: Vespertilionidae) Article
Zoologische Mededelingen, 45(12), 139-146.January 1971
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An investigation into the generic limits of Dalbergia and Machaerium (Papilionaceae) Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 358(1), 655-662.January 1971
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Die Gattung Opisthodonta Langerhans (Syllidae, Polychaeta): Wiederbeschreibung von O. Morena Langerhans Aus dem Westlichen Mittelmeer und aus dem roten meer und von O. Pterochaeta Southern, Neufund in der Nordsee vor der Niederländischen Küste Article
Zoologische Mededelingen, 45(8), 99-106.January 1971
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The Ascidian genera Pterygacidia Sluiter, 1904 and Ciallusia van name, 1918 Article
Zoologische Mededelingen, 45(10), 119-125.January 1971
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On six species of marine Mollusca from suriname, four of which are new Article
Zoologische Mededelingen, 45(5), 75-86.January 1971
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Some Streptaxidae (Mollusca) from West and Southern Africa with the description of a new species of Gulella Article
Zoologische Mededelingen, 45(22), 245-260.January 1971
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Helicidae (Gastropoda, Pulmonata) Gesammelt von der Niederländischen Biologischen expedition in die Türkei in 1959. I Article
Zoologische Mededelingen, 45(27), 313-323.January 1971