@article{243921,
      url = {http://digitallibrary.un.org/record/243921},
      title = {Methods for detection of gas leakages during extraction,  transmission, distribution and storage of natural gas :  replies to the questionnaire /},
      publisher = {UN,},
      recid = {243921},
      pages = {3 p. :},
      address = {Geneva :. 1996-07-22},
      year = {1996},
      month = {Jul},
}