Henk Brinkhuis, Jan Smit. The Geulhemmerberg Cretaceous/Tertiary boundary section (Maastrichtian type area, SE Netherlands); an introduction. njg [Internet]. 1996Jan.1 [cited 2026Mar.30];75:101-6. Available from: https://njgjournal.nl/index.php/njg/article/view/12364