@article{247913,
      url = {http://digitallibrary.un.org/record/247913},
      title = {Proposal for draft amendments to regulation no. 51, [Noise  of M and N categories of vehicles] /},
      publisher = {[UN],},
      recid = {247913},
      pages = {8 p.},
      address = {Geneva :. 1997-12-11},
      year = {1997},
      month = {Dec},
}