Publication
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Romeinse vondsten in de Biesbosch Article
Natura, 62(5), 111-113.January 1965
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Torla Article
Natura, 62(2/3), 25-26.January 1965
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Jac. P. Thijsse over zichzelf Article
Natura, 62(4), 29-39.January 1965
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Vogelwaarnemingen bij Den Haag in de strenge winter 1962/1963 Article
Natura, 62(1), 5-14.January 1965
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Waarnemingen aan de uitval van zangvogeltrek overzee gedurende de herfst 1964 Article
Natura, 62(10), 197-201.January 1965
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Trichilia monadelpha (Thonn.) J.J. De Wilde, comb. nov., A Preliminary Note Article
Acta botanica neerlandica, 14(4), 453-460.January 1966
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Book Reviews Article
Acta botanica neerlandica, 14(4), 461-463.January 1966
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Remarks on the position, the delimitation and the subdivision of the Rubiaceae Article
Acta botanica neerlandica, 15(1), 1-33.January 1966