Non-flint raw material use throughout time and space in the Middle Tagus Valley (Central Portugal)

3 Cruz, A.R. Oosterbeek, L. Rosina, P. Cura, S. Grimaldi, S. 2006 Non-flint raw material use throughout time and space in the Middle Tagus Valley (Central Portugal) International Colloquium 77 â��Non-flint Raw Material Use in Prehistory: Old Prejudices and New Directionâ�� Lisboa Archaeopress 4-9 september 2006 materie prime, portogallo