Publication
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Wespen in 1937 en 1938. Article
Entomologische Berichten, 10(224), 88-88.January 1938
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Vanessa io L. var. fulva Oudmns. uit de vrije natuur. Article
Entomologische Berichten, 10(224), 88-90.January 1938
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Aanteekeningen over de Nederlandsche vertegenwoordigers van het geslacht Blastodacna Wocke (Lepidoptera, Cosmopterygidae.) Article
Entomologische Berichten, 10(224), 91-95.January 1938
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Development and Growth of the Sclerenchyma Fibers and some Remarks on the Development of the Tracheids in some Monocotyledons Article
Recueil des travaux botaniques néerlandais, 35(1), 288-321.January 1938
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Revision of the Lauraceae III. The genera Aiouea, Systemonodaphne, Urbanodendron, Mezilaurus; additions and corrections to Licaria and Cryptocarya Article
Recueil des travaux botaniques néerlandais, 35(1), 56-129.January 1938
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Revision of the Lauraceae V. A monograph of the genera: Anaueria, Beilschmiedia (american species) and Aniba Article
Recueil des travaux botaniques néerlandais, 35(2), 834-931.January 1938
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Notes on the Acanthaceae of Surinam Article
Recueil des travaux botaniques néerlandais, 35(1), 130-176.January 1938
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Die beiden Azolla-Arten des Niederländischen Pleistozäns Article
Recueil des travaux botaniques néerlandais, 35(2), 932-945.January 1938