@article{278458,
      author = {Ludwig, Jens. and Cook, Philip J.,},
      url = {http://library.usi.edu/record/278458},
      title = {Evaluating gun policy : effects on crime and violence /},
      publisher = {Brookings Institution Press,},
      recid = {278458},
      pages = {ix, 469 p. :},
      address = {Washington, D.C. :},
      year = {2003},
}