@article{853491,
      note = {Includes indexes.},
      author = {Jefferson, Thomas A., and Webber, Marc A., and Pitman,  Robert L., and Gorter, Uko,},
      url = {http://library.usi.edu/record/853491},
      title = {Marine mammals of the world : a comprehensive guide to  their identification /},
      recid = {853491},
      pages = {1 online resource (617 pages) :},
}