@article{102118,
      url = {http://digitallibrary.un.org/record/102118},
      title = {Processing of coal into secondary energy sources :  questionnaire /},
      publisher = {UN,},
      recid = {102118},
      pages = {6 p. :},
      address = {Geneva :. 1983-05-31},
      year = {1983},
      month = {May},
}