Hastings, E.F., 1937, Mining and milling methods at the Pilgrim mine, Chloride, Arizona: U.S. Bureau of Mines Information Circular I.C. 6945, 18 p.
Hastings, E.F.
U.S. Bureau of Mines Information Circular I.C. 6945, 18 p.
Mineral District, Subsurface, Areal, Structure, Stratigraphy, Mineralization, Ore, Mining Engineering,