@article{227503,
      author = {Kippenhahn, Rudolf,},
      url = {http://library.usi.edu/record/227503},
      title = {Code breaking : a history and exploration /},
      publisher = {Overlook Press,},
      recid = {227503},
      pages = {283 p., [4] p. of plates :},
      address = {Woodstock, N.Y. :},
      year = {1999},
}