Publication
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The existence of an aestuarine fishfauna in South East Asia Article
Bijdragen tot de dierkunde, 28(1), 164-171.January 1949
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Prof. Dr. J. E. W. Ihle Article
Bijdragen tot de dierkunde, 28(1), 6-9.January 1949
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Training a young Chimpanzee to attend to acoustic stimuli Article
Bijdragen tot de dierkunde, 28(1), 32-40.January 1949
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Salt-tolerance of fresh-water fish groups in relation to zoogeographical problems Article
Bijdragen tot de dierkunde, 28(1), 315-322.January 1949
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Dates of publication of Malaysian phyto-taxonomical literature Article
Flora Malesiana Bulletin, 5(1), 137-141.January 1949
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On some fossil fish remains from Java Article
Zoologische Mededelingen, 30(5), 77-82.January 1949
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Introduction Article
Flora Malesiana Bulletin, 5(1), 123-124.January 1949
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On Pleistocene remains of Ophicephalus from Java, in the "Collection Dubois" Article
Zoologische Mededelingen, 30(6), 83-94.January 1949