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- Beinecke Rare Book and Manuscript Libraryโ[remove]3
- Geologists--United States--20th Centuryโ[remove]3
- Geology--California--Nevada County3
- Geology--West (U.S.)โ[remove]3
- Gold miners--United States--20th Century3
- Gold mines and mining--California3
- Mining engineers--United States--20th Century3
Current results range from 1913 to 1922