00712cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035002000092040004600112042001200158050001700170100002700187245004000214260003100254300003100285490010100316504005700417650002000474gs 20000016 DLC20260227111324.0840521s1919    enka     b    000 0 eng c  ags 20000016   a(OCoLC)10757908  aLibrary, U.S. Geological SurveycPBLdDLC  apremarc00aTN490.M3bC81 aCurtis, Alfred Harper.10aManganese ores,cby A.H. Curtis ...  aLondon,bJ. Murray,c1919.  ax, 118 p.bdiagrs.c22 cm.0 aImperial institute. Monographs on mineral resources with special reference to the British Empire  a"References to literature on manganese": p. 112-118. 0aManganese ores.