@article{243707,
      url = {http://digitallibrary.un.org/record/243707},
      title = {Technical and ecological norms required for the  determination of efficiency of use of household gas  installations : replies to the questionnaire /},
      publisher = {UN,},
      recid = {243707},
      pages = {4 p. :},
      address = {Geneva :. 1996-07-05},
      year = {1996},
      month = {Jul},
}