01227cam a2200301 4500009786307u1980509MiAaHDL20170424000000.0m d cr bn ---auaua730206s1898 dcuabf f000 0 eng ugs 0500081617898799sdr-uva.u1980509(OCoLC)553309RB(OCoLC)00553309(Sirsi) lgs05000816WSUm.c.OCLVA@VA@*QE91.S6 1898Spurr, Josiah Edward,1870-1950.Geology of the Aspen mining district, Colorado, with atlas.Washington,Govt. print. off.,1898.xxxv, 260, x p., 1 l.illus., xliii pl. (part col.) diagrs.31 x 23 cm. +atlas of XX sheets (55 x 46 cm.)Monographs of the United States Geological Surveyv. 31Literature: p. xxxii.Mode of access: Internet.2 10 14Silver mines and miningColorado.GeologyColorado.00978630720170424000000.020170519103921.02024-08-27T18:20:37Z2024-08-27T17:30:02ZSDR-UVAUNKNOWNprepare.pl-004-007BKsdr-uva.u1980509uvaSDRUVAuva.x030446518UVAu1980509UVAUVA20240827googleuva.x0304465181898pdbibUS fed doc