@article{102419,
      url = {http://digitallibrary.un.org/record/102419},
      title = {Drivage, development and support of roadways and faces in  deep mines - 1,000 metres and over - and consequently in  more difficult mining, geological and atmospheric  conditions /},
      publisher = {UN,},
      recid = {102419},
      pages = {11 p. :},
      address = {Geneva :. 1983-12-02},
      year = {1983},
      month = {Dec},
}