@article{482269,
      recid = {482269},
      author = {Sellars, Richard West,},
      title = {Preserving nature in the national parks a history : with a  new preface and epilogue / [electronic resource] :},
      publisher = {Yale University Press,},
      address = {New Haven :},
      pages = {xviii, 404 p. :},
      year = {1997},
      url = {http://library.usi.edu/record/482269},
}