@article{102433,
      url = {http://digitallibrary.un.org/record/102433},
      title = {Coal-face operations at longwall faces with mechanized and  automated systems : consolidated report /},
      publisher = {UN,},
      recid = {102433},
      pages = {6 p.},
      address = {Geneva :. 1984-05-30},
      year = {1984},
      month = {May},
}