000 002820000a22001210004500
245 _aThe economics of tungsten
100 _aBarbier, Claude
260 _aLondon
_bMetal Bulletin Books
_c1971
300 _a191 p.
080 _a622.346.3.003
_bB3
041 _aEN
942 _cBK
999 _c103488
_d103488