@article{795774,
      recid = {795774},
      author = {Abulafia, David, and Berend, Nora,},
      title = {Medieval frontiers : concepts and practices /},
      pages = {1 online resource (308 pages) :},
      note = {Includes index.},
      url = {http://library.usi.edu/record/795774},
}