@article{247281,
      author = {Lehtonen, Markku.},
      url = {http://digitallibrary.un.org/record/247281},
      title = {Criteria in environmental labelling : a comparative  analysis of environmental criteria in selected labelling  schemes /},
      publisher = {UNEP,},
      recid = {247281},
      pages = {148 p. :},
      address = {Geneva :. 1997},
      year = {1997},
}