1. Centre for Development Studies, University of Bergen, Norway.
2. State University of New York, Stony Brook, NY, USA.
3. Unité Mixte de Recherche (UMR) 5808, Institut de Prehistoire et de Geologie du Quaternaire, 33405, Talence, France.
4. UMR 7041, Archéologies et Sciences de l'Antiquité, 92023, Nanterre, France.
5. Council for Scientific and Industrial Research, 0001, Pretoria, South Africa.