@article{908503,
      author = {Sheffield, Justin. and Wood, Eric F.},
      url = {http://library.usi.edu/record/908503},
      title = {Drought past problems and future scenarios / [electronic  resource] :},
      publisher = {Earthscan,},
      recid = {908503},
      pages = {xii, 210 p. :},
      address = {London ;},
      year = {2011},
}