{"id":"000997145","type":"book","title":"Multiple viewshed analysis using GIS and its archaeological application: a case study in northern Mull","publisher-place":"Aarhus","pages":"125-132","container-title":"Computing the past. Computer applications and quantitative methods in archaeology. CAA 92","author":[{"family":"Ruggles","given":"C. L. N."}],"issued":{"raw":"1993"}}