00813cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040005500111042001200166050001500178051002700193110003200220245008000252260004800332300001800380500005700398650003100455650004500486700004000531gs 07000552 DLC20260227111306.0761117s1906    xx            000 0 eng c  ags 07000552   a(OCoLC)2562772  aLibrary, U.S. Geological SurveycOGraDdOCoLCdDLC  apremarc00aQE187b.B8  aTN424.B85bB8cCopy 2.2 aGeological Survey of Canada00aPreliminary report on the Rossland, B.C., mining district,cby R. W. Brock.  aOttawa,bGovernment printing bureau,c1906.  a40 p.c24 cm.  aAt head of cover-title: Geological survey of Canada. 0aGeologyzBritish Columbia. 0aGold mines and miningzBritish Columbia.1 aBrock, Reginald Walter,d1874-1935.