Publication
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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
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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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Beschreibung neuer Käfer aus Celebes Article
Notes from the Leyden Museum, 34(3/4), 171-174.January 1912
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Note on Orchestia parvispinosa M. Weber, a terrestrial Amphipod from Java Article
Notes from the Leyden Museum, 34(2), 163-168.January 1912
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A new species of the Rhynchophorid genus Cryptoderma Article
Notes from the Leyden Museum, 34(2), 95-96.January 1912
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Petricola pholadiformis Lam. on the Dutch coast Article
Notes from the Leyden Museum, 34(3/4), 240-242.January 1912
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Javanische Amphibien, gesammelt von Edw. Jacobson Article
Notes from the Leyden Museum, 34(2), 75-79.January 1912
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Third supplementary list of the described Apogonia-species, with an alteration in nomenclature Article
Notes from the Leyden Museum, 34(2), 128-128.January 1912