{"id":"001531087","type":"article","title":"A cost-control model for Imperial frontiers?","publisher":"Archaeopress Publishing Ltd.","publisher-place":"Oxford","pages":"711-718","container-title":"Roman frontier studies 2009: proceedings of the XXI International Congress of Roman Frontier Studies (Limes Congress) held at Newcastle-upon-Tyne in August 2009","author":[{"family":"Isserlin","given":"Raphael M. J"}],"issued":{"raw":"2017"}}