@article{140135,
      note = {"Annual bulletin of the UNCTAD Committee on Tungsten".},
      url = {http://digitallibrary.un.org/record/140135},
      title = {Tungsten statistics. 1991.},
      publisher = {UN,},
      recid = {140135},
      pages = {v, 70 p. :},
      address = {New York :. 1992},
      year = {1992},
}