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Directory Results for Digital mining claim density map for Federal lands in Colorado. USGS Open-File Report 99-410 to Digital Mining Claim Density Map for Federal Lands in Idaho. USGS Open File Report 99-543

Digital mining claim density map for Federal lands in Colorado. USGS Open-File Report 99-410
Digital Mining Claim Density Map for Federal Lands in Idaho. USGS Open File Report 99-543