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Marblehead mine quit claim deed 1915 Feb. 24
Mines Development Corporation legal papers 1934
Mountain View mine report undated
Mountain View lode abstract of title 1917 Feb. 17
New York Union Gold Mining Company prospectus 1902 Jan
Richmond group of mines descriptions 1908-[1945]
Richmond mine records 1900-1941
Richmond Mining Association, et al. prospectuses [1908]-1937
Richmond group of mines in Boulder County, Colorado leases 1936-1938

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