{"id":"001003121","type":"book","title":"Ptolemy and the pre-Flavian military sites of Britain","publisher":"Oxbow Books","publisher-place":"Oxford","pages":"33-40","container-title":"Roman frontier studies. 1995. Proceedings of the 16th International Congress of Roman Frontier Studies","author":[{"family":"Manning","given":"W. H."}],"issued":{"raw":"1997"}}