@article{243704,
      url = {http://digitallibrary.un.org/record/243704},
      title = {Instruments for continuous measurement of concentrations  of noxious components in gas combustion products and in the  atmosphere : reply to the questionnaire /},
      publisher = {UN,},
      recid = {243704},
      pages = {2 p. :},
      address = {Geneva :. 1997-05-16},
      year = {1997},
      month = {May},
}