01400nam a2200373Ia 4500005979330MiAaHDL20250726000000.0m d cr bn ---auaua060727s1940 dcua f000 0 eng d(MiU)990059793300106381sdr-miu.990059793300106381(MiU)MIU01000000000000005979330-goog(OCoLC)70710624(MiU)Aleph005979330LHLLHLUSBMIUtOrBLWn-us-coUSBII 28.27:7125Hedges, J. H.Possibilities of manganese production at Leadville, Colo. /by J. H. Hedges.Mineral industries survey of the United States:Colorado, Lake County.Washington, D.C. :U.S. Dept of the Interior, Bureau of Mines,1940.23 p. :ill. ;26 cm.texttxtrdacontentcomputercrdamediaonline resourcecrrdacarrierInformation circular / Bureau of Mines ;7125"July 1940".Mode of access: Internet.Manganese mines and miningColoradoLeadville.ManganeseColoradoLeadville.United States.Bureau of Mines.http://id.loc.gov/authorities/names/n79063444http://id.loc.gov/rwo/agents/n790634443901507853406500597933020241218070827.020250726000000.020260317165347.02026-03-18T08:39:38Z2026-03-04T18:30:03ZSDR-MIUmiuALMAprepare.pl-004-009BKsdr-miu.990059793300106381MiUSDRGWLA005979330mdp.39015078534065MIU990059793300106381MIUGWLA20260318googlemdp.390150785340651940pdbibUS fed doc