SSmall-scale placer-mining methodsSmall-scale placer-mining methodsde Charles Freeman JacksonMateriasGoldMines and miningHydraulic miningBibliographyEdiciones (1)Small-scale placer-mining methods (1932)inglésMás obras de Charles Freeman JacksonGGold 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 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