@article{253918,
      url = {http://digitallibrary.un.org/record/253918},
      title = {Control techniques for emissions of oxidized nitrogen  compounds (NOx) from selected road and off-road vehicles,  aircraft and ships.},
      publisher = {UN,},
      recid = {253918},
      pages = {16 p. :},
      address = {Geneva :. 1998-04-30},
      year = {1998},
      month = {Apr},
}