@article{188324,
      url = {http://digitallibrary.un.org/record/188324},
      title = {Workshop on Critical Levels for Ozone.},
      publisher = {UN,},
      recid = {188324},
      pages = {5 p.},
      address = {Geneva :. 1994-03-24},
      year = {1994},
      month = {Mar},
}