00706cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035001900092040002100111042001200132050002200144100004900166245006500215260004300280300002100323490004100344500002000385650001400405810005700419gs 13000377 DLC20260227111314.0790828s1913    dcu          f001 0 eng    ags 13000377   a(OCoLC)5318401  aDLCcICharEdDLC  apremarc00aQE75b.B9 no. 5291 aEmmons, William H.q(William Harvey),d1876-14aThe enrichment of sulphide ores /cby William Harvey Emmons.  aWashington,bGovt. Print. Off.,c1913.  a260 p. ;c24 cm.1 aU.S. Geological survey. Bulletin 529  aIncludes index. 0aSulfides.1 aUnited States.bGeological Survey.tBulletin ;v529.