Publication
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Die von der Niederländischen Biologischen expedition in die Türkei in 1959 Gesammelten Nacktschnecken (Milacidae und Limacidae, Pulmonata) mit Beschreibung Einer neuen Deroceras-art aus dem Balkan-Gebiet und der Türkei Article
Zoologische Mededelingen, 45(23), 261-280.January 1971
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The Mountain Elevation Effect Article
Flora Malesiana Bulletin, 25(1), 1908-1908.January 1971
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The Foraminifera of Piscadera Bay, Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 35(1), 1-62.January 1971
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Ecology of the medusa Cassiopea xamanchana in Curaçao Article
Studies on the Fauna of Curaçao and other Caribbean Islands, 38(1), 110-115.January 1971
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Taxonomy, ecology, and distribution of Rhynchospora (Cyp.) in Suriname Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 354(1), 428-450.January 1971
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Pollen morphology of the genera Norantea, Souroubea and Ruyschia (Marcgraviaceae) Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 365(1), 199-232.January 1971
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Records of some rare Pontoniid Shrimps from Australian Waters, with remarks upon the Mouthparts of some species of the genus Periclimenes Costa, 1844 Article
Zoologische Verhandelingen, 114(1), 1-32.January 1971
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Further notes on the spiders of New Guinea I (Argyopidae) Article
Zoologische Verhandelingen, 113(1), 1-52.January 1971