@article{422929,
      author = {Richards, John F.},
      url = {http://library.usi.edu/record/422929},
      title = {The unending frontier an environmental history of the  early modern world by / [electronic resource] :},
      publisher = {University of California Press,},
      recid = {422929},
      pages = {xiv, 682 p. :},
      address = {Berkeley :},
      year = {2003},
}