{"id":"000992149","type":"book","title":"Phosphate survey: method and meaning","publisher":"Oxbow Books","publisher-place":"Oxford","pages":"61-73","container-title":"Geoprospection in the archaeological landscape. Papers based on contributions to a conference held in january 1989 by The Archaeological Unit, Department of Tourism, and Heritage Conservation, Bournemouth Polytechnic","author":[{"family":"Walker","given":"Rick"}],"issued":{"raw":"1992"}}