Publication
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Contribution à l'étude des Hepialidae (22ème note) : Hepialidae du Musée de Leiden Article
Zoologische Mededelingen, 31(7), 67-77.January 1950
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Book reviews Article
Flora Malesiana Bulletin, 7(1), 232-236.January 1950
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Dates of publication of Malaysian phyto-taxonomical literature 6 Article
Flora Malesiana Bulletin, 7(1), 193-196.January 1950
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The changes in the International Rules of Botanical Nomenclature made by the 7 th Int. Bot. Congress at Stockholm An unofficial review Article
Flora Malesiana Bulletin, 7(1), 197-231.January 1950
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Pliocene Mollusca from a coral limestone of a hill near Sekoerau, E. Borneo Article
Leidse Geologische Mededelingen, 15(1), 305-318.January 1950
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Further Notes on the Ampullae of Millepora Article
Zoologische Mededelingen, 31(5), 49-61.January 1950
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Annotated phyto-taxonomical & phyto-geographical publications on or of importance to the Malaysian flora Article
Flora Malesiana Bulletin, 6(1), 169-180.January 1950
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Far-Eastern Wartime Publications on Malaysian plants III Article
Flora Malesiana Bulletin, 6(1), 162-163.January 1950