@article{268901,
      recid = {268901},
      author = {Steffen, Robert. and DuPont, Herbert L.,},
      title = {Manual of travel medicine and health [electronic resource]  /},
      publisher = {B.C. Decker,},
      address = {Hamilton, Ont. :},
      pages = {1 online resource (vii, 515 p.) :},
      year = {1999},
      url = {http://library.usi.edu/record/268901},
}