The Significance of Subtlety: Contrasting Lithic Raw Materials Procurement and Use Patterns at the Oldowan Sites of Barranco Leon and Fuente Nueva 3 (Orce, Andalusia, Spain) - Barsky, Deborah; Titton, Stefania; Sala-Ramos, Robert; Bargallo, Amelia; Gregoire, Sophie; Saos, Thibaud; Serrano-Ramos, Alexia; Oms, Oriol; Solano Garcia, Jose-Antonio; Toro-Moyano, Isidro; Jimenez-Arenas, Juan Manuel; (Frontiers In Earth Science, 2022)