{"id":"001571578","type":"article","title":"Schematic rock art in the central area of river Duero Valley, in the provinces of León, Zamora and Salamanca","publisher":"Cambridge Scholars Publishing","publisher-place":"Newcastle upon Tyne","pages":"4-22","container-title":"Archaeology in the River Duero Valley","author":[{"family":"Cadierno Guerra","given":"Feliciano."}],"issued":{"raw":"2018"}}