Publication
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The coral Montipora monasteriata (Forsk.) in the Fiji Islands Article
Zoologische Mededelingen, 31(9), 89-94.January 1951
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Book reviews Article
Flora Malesiana Bulletin, 8(1), 268-270.January 1951
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The Papua and New Guinea Herbarium Article
Flora Malesiana Bulletin, 8(1), 262-264.January 1951
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Miscellaneous information Article
Flora Malesiana Bulletin, 8(1), 260-262.January 1951
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Notes on Asrara latreille (Hymenoptera Sphecoidea) Article
Zoologische Mededelingen, 31(15), 149-164.January 1951
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Some notes on Notodelphys rufescens Thorell, 1860, new to the Dutch Fauna Article
Beaufortia, 1(6), 1-4.January 1951
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A taxonomic study of the Phytoseiinae (Family Laelaptidae) Predaceous upon Tetranychidae of Economic importance Article
Zoologische Verhandelingen, 12(1), 1-64.January 1951
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Corrections in the Changes in the International Rules, etc Article
Flora Malesiana Bulletin, 8(1), 267-268.January 1951