{"id":"001186443","type":"book","title":"Prehistoric human footprints from the Severn Estuary at Uskmouth and Magor Pill, Gwent, Wales","pages":"14-55","container-title":"Archaeologia Cambrensis, 7th Series, 141 (1992","author":[{"family":"Aldhouse-Green","given":"S. H. R."}],"issued":{"raw":"1992"}}