@article{822797,
      author = {Phillips, J. R. S.,},
      url = {http://library.usi.edu/record/822797},
      title = {Aymer de Valence : Earl of Pembroke 1307-1324 : baronial  politics in the reign of Edward II /},
      recid = {822797},
      pages = {1 online resource :},
}