@article{459002,
      url = {http://digitallibrary.un.org/record/459002},
      title = {Proposal for the harmonization of vertical road signs /},
      publisher = {UN,},
      recid = {459002},
      pages = {2 p.},
      address = {Geneva :. 2002-01-17},
      year = {2002},
      month = {Jan},
}