{"id":"000992164","type":"book","title":"Rough stone tools","publisher":"Archaeopress","publisher-place":"Oxford","pages":"147-159","container-title":"Settlements at Skaill, Deerness, Orkney : Excavations by Peter Gelling of the prehistoric, Pictish, Viking and later periods, 1963-1981","author":[{"family":"Porter","given":"Deborah"}],"issued":{"raw":"1997"}}