@article{793578,
      note = {"An RFF Press book"--Title page verso.},
      author = {Simpson, Ralph David, and Toman, Michael A., and Ayres,  Robert U.,},
      url = {http://library.usi.edu/record/793578},
      title = {Scarcity and growth revisited : natural resources and the  environment in the new millennium /},
      recid = {793578},
      pages = {1 online resource (305 pages) :},
}