Publication
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Bird-marking in the Netherlands. II. Recovery of marked Birds Article
Notes from the Leyden Museum, 34(3/4), 243-256.January 1912
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Quelques Foraminiferes de Java Article
Sammlungen des Geologischen Reichs-Museums in Leiden. Serie 1, Beiträge zur Geologie Ost-Asiens und Australiens, 8(1), 279-294.January 1912
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On the differences between the female of Brassolis sophorae sophorae (L.) and that of Sophorae Lurida (Stich.) Article
Notes from the Leyden Museum, 34(3/4), 257-258.January 1912
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Plecoptera aus Java. Eine neue Nemura-Art Article
Notes from the Leyden Museum, 34(3/4), 194-196.January 1912
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The polyporoid types of Léveillé at Leiden. Letter No. 36 Article
Mededeelingen van 's Rijks Herbarium, Leiden, 9(1), 1-5.January 1912
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Studien über Foraminiferen aus Ost-Asien Article
Sammlungen des Geologischen Reichs-Museums in Leiden. Serie 1, Beiträge zur Geologie Ost-Asiens und Australiens, 9(1), 201-224.January 1912
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Etude sur les Aphanocephalus et descriptions d’espèces nouvelles Article
Notes from the Leyden Museum, 34(3/4), 197-224.January 1912
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Report on Birds from the Netherlands received from 1 September 1911 till 1 September 1912 Article
Notes from the Leyden Museum, 34(3/4), 231-234.January 1912