@article{168080,
      note = {Prepared by governmentally designated experts at  consultations held in Geneva, 22-23 Feb. and 15 Apr. 1993.},
      url = {http://digitallibrary.un.org/record/168080},
      title = {Nitrogen oxide emissions from on-road heavy-duty vehicles  (HDV) : options for further reduction : note /},
      publisher = {UN,},
      recid = {168080},
      pages = {11 p. :},
      address = {Geneva :. 1993-05-03},
      year = {1993},
      month = {May},
}