@article{948383,
      author = {Petersen, Leif Inge Ree.},
      url = {http://library.usi.edu/record/948383},
      title = {Siege warfare and military organization in the successor  states (400-800 AD) : Byzantium, the West and Islam /},
      recid = {948383},
      pages = {1 online resource (849 pages) :},
}