Publication
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The indoleacetic acid content of root nodules and roots of Cycas circinalis L. with regard to other root-nodule systems Article
Acta botanica neerlandica, 17(6), 496-498.January 1968
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The influence of light of different spectral regions on the synthesis of phenolic compounds in gherkin seedlings, in relation to photomorphogenesis. V. The temperature dependence Article
Acta botanica neerlandica, 17(6), 499-505.January 1968
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A study on pollen dispersal and sedimentation in the western part of the Netherlands Article
Acta botanica neerlandica, 17(6), 506-549.January 1968
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Book Review Article
Acta botanica neerlandica, 17(6), 550-550.January 1968
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Goudvinkproblemen Article
Het Vogeljaar, 16(1), 467-469.January 1968
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Zaanse vogelwachters voor de vogeltrek naar Zuid-Zweden Article
Het Vogeljaar, 16(1), 470-473.January 1968
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Over de „Nederlandse” goudplevieren Article
Het Vogeljaar, 16(1), 474-479.January 1968
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Verbiedde handel in opgezette roofvogels Article
Het Vogeljaar, 16(1), 480-482.January 1968