Publication
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Trekvogels à la crême Article
De Korhaan, 5(8), 18-19.January 1971
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Waterwildtelling Article
De Korhaan, 5(8), 20-20.January 1971
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De avifauna van Midden-Nederland Article
De Korhaan, 5(8), 20-20.January 1971
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Op de drempel ….. Article
De Korhaan, 5(8), 22-22.January 1971
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Fossil Ensis species in the Netherlands Article
Basteria, 35(1/4), 1-37.January 1971
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Boekbespreking Article
Basteria, 35(1/4), 37-40.January 1971
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De fossiele schelpen van de Nederlandse stranden en zeegaten, tweede serie, 4 Article
Basteria, 35(1/4), 41-50.January 1971
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Winter vagility of the aquatic snail Lymnaea (Galba) bulimoides Lea Article
Basteria, 35(1/4), 63-72.January 1971