Publication
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De flora van het Rijk van Nijmegen Article
Natura, 68(3), 30-34.January 1971
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Natuurbescherming in Gelderland Article
Natura, 68(3), 22-24.January 1971
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Boekbesprekingen Article
Limosa, 45(4), 199-200.January 1972
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A new species of Langsdorffia from New Guinea (Balanophoraceae) Article
Acta botanica neerlandica, 21(1), 102-106.January 1972
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Meetings of the Royal Botanical Society of the Netherlands Article
Acta botanica neerlandica, 21(1), 107-112.January 1972
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Facts and fiction in floral morphology with special reference to the Polycarpicae. 1. A general survey Article
Acta botanica neerlandica, 21(2), 113-127.January 1972
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Some observations with light and electron microscope on the endotrophic mycorrhiza of orchids Article
Acta botanica neerlandica, 21(2), 128-144.January 1972
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An effect of temperature on the inhibition of ammonium absorption by potassium in excised barley roots Article
Acta botanica neerlandica, 21(2), 145-148.January 1972