@article{244310,
      url = {http://digitallibrary.un.org/record/244310},
      title = {Basic criteria for the selection of optimum coal  technologies in the light of modern environmental  requirements : questionnaire /},
      publisher = {UN,},
      recid = {244310},
      pages = {4 p.},
      address = {Geneva :. 1994-09-22},
      year = {1994},
      month = {Sep},
}