@article{414693,
      url = {http://library.usi.edu/record/414693},
      title = {Ward Valley an examination of seven issues in earth  sciences and ecology / [electronic resource] :},
      publisher = {National Academy Press,},
      recid = {414693},
      pages = {1 v. (various pagings) :},
      address = {Washington, DC :},
      year = {1995},
}