Publication
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Two new Asiatic species of the Celeopterous genus Helota Article
Notes from the Leyden Museum, 28(3/4), 213-217.January 1907
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On the New-Guinea Mammals Article
Notes from the Leyden Museum, 28(3/4), 161-212.January 1907
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Zwei neue Arten der Gattung Coelosterna (Coleoptera) aus Sumatra Article
Notes from the Leyden Museum, 29(1), 54-56.January 1907
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Helminthen von Herrn Edward Jacobson in Java (Semarang) gesammelt Article
Notes from the Leyden Museum, 29(2), 81-87.January 1907
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On the African species of the genus Psychopsis Newm. (Osmylidae) Article
Notes from the Leyden Museum, 28(3/4), 146-148.January 1907
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Deux espèces nouvelles du genre Heliaeschna (Aeschnidae) Article
Notes from the Leyden Museum, 28(3/4), 221-223.January 1907
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Neue Trichopteren Article
Notes from the Leyden Museum, 29(1), 1-53.January 1907
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Die Copeognathen Javas Article
Notes from the Leyden Museum, 29(2), 107-126.January 1907