@article{309388,
      author = {Erwin, Douglas H.,},
      url = {http://library.usi.edu/record/309388},
      title = {Extinction : how life on earth nearly ended 250 million  years ago /},
      publisher = {Princeton University Press,},
      recid = {309388},
      pages = {viii, 296 p. :},
      address = {Princeton, N.J. :},
      year = {2006},
}