{"id":"001345283","type":"article","title":"Systems of obstacles on Hadrian's Wall and their relationship to the Turrets","publisher":"Polifemo","publisher-place":"Madrid","pages":"1119-1124","container-title":"Limes XX : XX congreso internacional de estudios sobre la frontera romana","author":[{"family":"Bidwell","given":"Paul T."}],"issued":{"raw":"2009"}}