The research for this paper was subsidized by The Netherlands Organisation for Scientific Research (NWO) as an Odyssee project. The tools were drawn J.M. Smit and by E. Bolhuis (fig. 35), both from the Groningen Institute of Archaeology, University of Groningen. We are grateful for comments from the editors, the anonymous peer reviewer and Kinie Esser and Jørn T. Zeiler.
University of Groningen, Groningen Institute of Archaeology,