@article{112163,
      note = {"Annual bulletin of the UNCTAD Committee on Tungsten".},
      url = {http://digitallibrary.un.org/record/112163},
      title = {Tungsten statistics 1990.},
      publisher = {UN,},
      recid = {112163},
      pages = {v, 74 p. :},
      address = {New York :. 1991},
      year = {1991},
}