A 300-500 ka ESR chronology of some achulian sites in Occidental Europe - Falguères, Christophe; Bahain, Jean-Jacques; Mercier, Norbert; Duval, Mathieu; Shao, Qingfeng; Han, Fei; Pérez-González, Alfredo; Lumley, Henry de; Dolo, Jean-Michel; García, Tristan (2008)