{"id":"000385733","type":"book","title":"Five postholes and a ditch. The Valkenburg-Marktveld. Timber watch and signal tower","pages":"73-102","container-title":"Archaeology in confrontation. Aspects of Roman military presence in the Northwest. Studies in honour of Prof. em. Hugo Thoen","author":[{"family":"Dierendonck","given":"R.M. van"}]}