@article{244137,
      url = {http://digitallibrary.un.org/record/244137},
      title = {ECE classification of dynamic phenomena in mines /},
      publisher = {UN,},
      recid = {244137},
      pages = {17 p. :},
      address = {Geneva :. 1993-07-08},
      year = {1993},
      month = {Jul},
}