Publication
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A Plant-Geographical Analysis of the Lesser Sunda Islands Article
Acta botanica neerlandica, 4(2), 200-225.January 1955
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Epipactis helleborine, a Problem of Nomenclature Article
Acta botanica neerlandica, 4(2), 226-241.January 1955
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Montia fontana in Nederland Article
Acta botanica neerlandica, 4(2), 242-272.January 1955
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On the Ideal Value of Varying Characters Article
Acta botanica neerlandica, 4(2), 273-320.January 1955
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Gel Diffusion of Tobacco Mosaic Virus, Demonstrated by Serological Analysis of its Components and by Electronmicroscopy Article
Acta botanica neerlandica, 4(3), 474-476.January 1955
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Reduction of the Genera Schizopremna Baill. (verb.) and Worcesterianthus Merr. (Olacac.) Article
Acta botanica neerlandica, 4(3), 477-480.January 1955
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Plant Growth under Desert Conditions Article
Acta botanica neerlandica, 4(3), 481-484.January 1955
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In Memoriam Dr P. Jansen Article
Acta botanica neerlandica, 4(4), 485-486.January 1955