Spence, C. C. (1989). The Conrey Placer Mining Company: A pioneer gold-dredging enterprise in Montana, 1897-1922. Montana Historical Society Press.
Citace podle Chicago (17th ed.)Spence, Clark C. The Conrey Placer Mining Company: A Pioneer Gold-dredging Enterprise in Montana, 1897-1922. Helena: Montana Historical Society Press, 1989.
Citace podle MLA (8th ed.)Spence, Clark C. The Conrey Placer Mining Company: A Pioneer Gold-dredging Enterprise in Montana, 1897-1922. Montana Historical Society Press, 1989.
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