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1887 Geological Map of the Clear Lake Distric … Geologic Atlas Geological Map of the Clear Lake Distric … |
1887 Geological Map of the Sulphur Bank Distr … Geologic Atlas Geological Map of the Sulphur Bank Distr … |
1887 Geological Map of the New Idria District … Geologic Atlas Geological Map of the New Idria District … |
1887 Geological Map of the New Almaden Mining … Geologic Atlas Geological Map of the New Almaden Mining … |
1887 Ore-Bodies and Topography of Mine-Hill, … Geologic Atlas Ore-Bodies and Topography of Mine-Hill, … |
1887 Plan of the New Almaden Mine. Geologic Atlas Plan of the New Almaden Mine. U.S. Geolo … |
1887 Longitudinal Section of the South Ore Ch … Geologic Atlas Longitudinal Section of the South Ore Ch … |