{"id":"000998276","type":"book","title":"A GIS-based approach to estimating the human effort involved in movement over natural terrain","publisher-place":"Helsinki","pages":"117-126","container-title":"Proceedings of the 7th Nordic Conference on the Application of Scientific Methods in Archaeology, Savonlinna, Finland, 7-11 september 1996","author":[{"family":"Marble","given":"Duane F."}],"issued":{"raw":"1997"}}