00724cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001800092040003900110042001200149050002200161086001400183100003800197245006400235260004300299300001100342410005000353650002300403650003900426999001700465gs 05000816 DLC20260227111302.0730206s1898    xx            000 0 eng    ags 05000816   a(OCoLC)553309  aDLCcODaWUdOCoLCdISSdOCoLCdDLC  apremarc00aQE75b.M7 vol. 310 aI 19.9:311 aSpurr, Josiah Edward,d1870-1950.10aGeology of the Aspen mining district, Colorado, with atlas.  aWashington,bGovt. print. off.,c1898.  a260 p.20aGeological Survey (U.S.).tMonographs,vv. 31 0aGeologyzColorado. 0aSilver mines and miningzColorado.  c24297d24297