@article{244168,
      url = {http://digitallibrary.un.org/record/244168},
      title = {Research and development on safety in mines : replies to  the questionnaire /},
      publisher = {[UN],},
      recid = {244168},
      pages = {4 p.},
      address = {Geneva :. 1993-06-18},
      year = {1993},
      month = {Jun},
}