van den Biggelaar D, van Balen R, Kluiving S, Verpoorte A, Alink G. Gravel size matters: Early Middle Palaeolithic artefacts made from local Rhine and Meuse deposits in the central Netherlands. NJG [Internet]. 2016Nov.21 [cited 2026Oct.18];96:261 -271. Available from: https://njgjournal.nl/index.php/njg/article/view/11777