@article{186899,
      url = {http://digitallibrary.un.org/record/186899},
      title = {Energy statistics yearbook. 1991 = Annuaire des  statistique de l'énergie. 1991.},
      publisher = {UN,},
      recid = {186899},
      pages = {xlix, 448 p. :},
      address = {New York :. 1993},
      year = {1993},
}