@article{102435,
      url = {http://digitallibrary.un.org/record/102435},
      title = {Coal-face operations with mechanized and automated systems  /},
      publisher = {UN,},
      recid = {102435},
      pages = {14, 7 p. :},
      address = {Geneva :. 1983-12-19},
      year = {1983},
      month = {Dec},
}