Publication
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Revision of Ficus Article
Flora Malesiana Bulletin, 11(1), 428-430.January 1955
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Progress in Malaysian botany Article
Flora Malesiana Bulletin, 11(1), 406-408.January 1955
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Obituary notes Article
Flora Malesiana Bulletin, 11(1), 399-401.January 1955
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Rhizocephala from New Guinea : III. Loxothylacus variabilis Boschma Article
Zoologische Mededelingen, 34(6), 89-107.January 1955
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Parnassiana nova : VI. Kritische revision der Gattung Parnassius (Fortsetzung 3) Article
Zoologische Mededelingen, 33(21), 181-207.January 1955
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The Rhizocephalan parasite of the crab Xantho incisus (Leach) Article
Zoologische Mededelingen, 33(23), 227-235.January 1955
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Pollen analytical investigation in the Northern Netherlands. With special reference to Archaeology Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 127(1), 1-81.January 1955
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Goodeniaceae Article
Flora Malesiana - Series 1, Spermatophyta, 5(1), 335-344.January 1955