@article{312835,
      author = {Denny, Mark,},
      url = {http://library.usi.edu/record/312835},
      title = {Ingenium : five machines that changed the world /},
      publisher = {Johns Hopkins University Press,},
      recid = {312835},
      pages = {xvi, 176 p. :},
      address = {Baltimore :},
      year = {2007},
}