The Middle – Upper Pleistocene open air site of Ribeira da Ponte da Pedra (Midlle Tagus Basin, Central Portugal) - Rosina, P; Cura, S; Grimaldi, S (International Colloquium 39 “Lower Paleolithic: short and long chronologies, lithic industries linear evolution models, transition to the middle Palaeolithic, 2006)
Keywords: paleolitico, selce