@article{1488177,
      note = {Includes bibliographical references (p. 11-12).},
      url = {http://digitallibrary.un.org/record/1488177},
      title = {Progress in level II modelling and mapping of ozone for  crops and natural vegetation : summary report /},
      publisher = {UN,},
      recid = {1488177},
      pages = {14 p. :},
      address = {Geneva :. 1999-06-08},
      year = {1999},
      month = {Jun},
}