What does size mean? Searching for reasons for small tools in Navalmaíllo Rock Shelter by experimenting with quartz knapping from the Lozoya river Valley (Madrid, Spain) - Abrunhosa, Ana; Márquez, Belén; Maíllo Fernández, José Manuel; Martín-Perea, David Manuel; Arsuaga, Juan Luis; Pérez-González, Alfredo; Baquedano, Enrique (2018)