00658cam a22002294a 450000100060000000300110000600500170001700800410003404000270007504100080010204400080011008000110011810000140012924501130014326000560025630000270031265000270033965000190036665000140038565500100039970000190040936677AR-SsjUBGM20251206161953.0250720s1947    xxu           000 0 eng d  aAR-SsjUBGMcAR-SsjUBGM0 aeng  axxu  a553.461 aLi, K. C.10aTungsten :bits history, geology, ore-dressing, metallurgy, chemistry, analysis, applications and economics.  aNew York :bReinhold Publishing Corporation,c1947.  a430 p. :bil. ;c23 cm 4aGeología económica 4aRecurso minero 4aTungsteno 4aLibro1 aYu Wang, Chung