@article{102122,
      url = {http://digitallibrary.un.org/record/102122},
      title = {Perfecting of maintenance and servicing systems for  longwall face equipment /},
      publisher = {UN,},
      recid = {102122},
      pages = {8 p.},
      address = {Geneva :. 1984-06-13},
      year = {1984},
      month = {Jun},
}