Publication
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The Geology of the Bergamasc Alps Lombardia Italy Article
Leidse Geologische Mededelingen, 14(2), 1-257.January 1949
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Pollenanalytisch en Geologisch onderzoek van het Onder- en Midden-Pleistoceen van Noord-Nederland Article
Leidse Geologische Mededelingen, 14(2), 258-346.January 1949
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”Nomenclaturally extinct” works Article
Flora Malesiana Bulletin, 5(1), 135-136.January 1949
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Annotated phyto-taxonomical & phyto-geographical publications on or of importance to the Malaysian flora Article
Flora Malesiana Bulletin, 5(1), 142-155.January 1949
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List of co-operating Herbaria Article
Flora Malesiana Bulletin, 5(1), 127-128.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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Introduction Article
Flora Malesiana Bulletin, 5(1), 123-124.January 1949
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State of progress in Malaysian plant taxonomy Article
Flora Malesiana Bulletin, 5(1), 126-127.January 1949