@article{694699,
      author = {Erskine, Ralph. and Smith, Michael,},
      url = {http://library.usi.edu/record/694699},
      title = {The Bletchley Park codebreakers /},
      publisher = {Biteback,},
      recid = {694699},
      pages = {xvi, 495 p., [8] p. of plates :},
      address = {London :},
      year = {2011},
}