{"id":"000307059","type":"book","title":"Siege-craft from the sixth to the tenth century","pages":"111-117","container-title":"\"De rebus bellicis\", 1. Aspects of the \"De rebus bellicis\". Papers presented to Professor E.A. Thompson. 2. \"De rebus bellicis\". The text","author":[{"family":"Hill","given":"D."}]}