Charles Freeman Jackson1886 · 4 obras en el catálogoObrasSSmall-scale placer-mining methodsSmall-scale placer-mining methodsGGold mining and milling in the United States and CanadaGold mining and milling in the United States and CanadaLLead and zinc mining and milling in the United StatesLead and zinc mining and milling in the United StatesMMetal-mining practiceMetal-mining practice
GGold mining and milling in the United States and CanadaGold mining and milling in the United States and Canada
LLead and zinc mining and milling in the United StatesLead and zinc mining and milling in the United States