@article{160188,
      note = {Prepared by the Central Statistical Service (Data  Management Division) of UNCTAD.},
      url = {http://digitallibrary.un.org/record/160188},
      title = {Tungsten statistics : UNCTAD annual bulletin.},
      publisher = {UN,},
      recid = {160188},
      address = {New York :. 1993},
      year = {1993},
}