@article{268336,
      author = {Darwin, Charles, and Beer, Gillian.},
      url = {http://library.usi.edu/record/268336},
      title = {The origin of species [electronic resource] /},
      publisher = {Oxford University Press,},
      recid = {268336},
      pages = {1 online resource (xxxiii, 439 p.) :},
      address = {Oxford :},
      year = {1996},
}