@article{312996,
      author = {Montgomery, David R.,},
      url = {http://library.usi.edu/record/312996},
      title = {Dirt : the erosion of civilizations /},
      publisher = {University of California Press,},
      recid = {312996},
      pages = {ix, 285 p. :́},
      address = {Berkeley :},
      year = {2007},
}