@article{694411,
      author = {Bauer, Craig P.},
      url = {http://library.usi.edu/record/694411},
      title = {Secret history : the story of cryptology /},
      abstract = {"Codes are a part of everyday life, from the ubiquitous  Universal Price Code (UPC) to postal zip codes. They need  not be intended for secrecy. They generally use groups of  letters (sometimes pronounceable code words) or numbers to  represent other words or phrases. There is typically no  mathematical rule to pair an item with its representation  in code. A few more examples will serve to illustrate the  range of codes"--},
      recid = {694411},
      pages = {xxv, 594 pages :},
}