@article{697464,
      author = {Ellerton, Nerida F. and Clements, M. A. and Rickey, Fred.},
      url = {http://library.usi.edu/record/697464},
      title = {Abraham Lincoln's cyphering book and ten other  extraordinary cyphering books [electronic resource]  /},
      recid = {697464},
      pages = {1 online resource :},
}