@article{255610,
      url = {http://digitallibrary.un.org/record/255610},
      title = {Updated maps of critical loads, uncertainties and  exceedance : note /},
      publisher = {UN,},
      recid = {255610},
      pages = {8 p. :},
      address = {Geneva :. 1998-06-08},
      year = {1998},
      month = {Jun},
}