New archaeological and geological research at SHK main site (Bed II, Olduvai Gorge, Tanzania) - Díez Martín, Fernando; Sánchez-Yustos, Policarpo; Uribelarrea del Val, David; Domínguez-Rodrigo, Manuel; Fraile, Cristina; Obregón, Rosa Ana; Díaz-Muñoz, Isabel M.; Mabulla, Audax Z. P.; Baquedano, Enrique; Pérez-González, Alfredo; Bunn, Henry T. (2014)