@article{75920,
      url = {http://digitallibrary.un.org/record/75920},
      title = {Programme of the 4th session, and the study tour : Group  of Experts on Open-cast Mines.},
      publisher = {UN,},
      recid = {75920},
      pages = {2 p.},
      address = {Geneva :. 1982-12-23},
      year = {1982},
      month = {Dec},
}