@article{520849,
      url = {http://digitallibrary.un.org/record/520849},
      title = {Toxic gas mixtures (TGM) : classification of gas mixtures  for toxic effect /},
      publisher = {UN,},
      recid = {520849},
      pages = {14 p. :},
      address = {Geneva :. 2004-04-30},
      year = {2004},
      month = {Apr},
}