@article{870013,
      note = {Subtitle of volume 2: "With appendices on fresh-water  turtle, fishes of the Nile, etc. by Drs. Gray and  Günther."},
      author = {Petherick, John, and Petherick, and Gray, John Edward, and  Günther, Albert C. L. G.},
      url = {http://library.usi.edu/record/870013},
      title = {Travels in central Africa : and explorations of the  western Nile tributaries /},
      recid = {870013},
      pages = {1 online resource (2 volumes) :},
}