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  1. The Belman, a gold mining corporation of the Big Five mines at Idaho Springs, Colorado : office of the company, 1824 Curtis Street, Denver, Colo

    • Name: Belman Mining Company; Big Five (Mining association); Belman Mining Company; Big Five (Mining association)
    • Date: 1901
    • Topic: Mining corporations; Mines and mineral resources; Gold mines and mining
    • Format: text
  2. Prospectus of the Thunder Mountain Gold Mining Company

    • Name: Thunder Mountain Gold Mining Company; Thunder Mountain Gold Mining Company
    • Date: 1902?
    • Topic: Mines and mineral resources; Mining corporations; Gold mines and mining
    • Format: text
  3. The North American Exploitation Company

    • Name: North American Exploitation Co
    • Date: 1907?
    • Topic: Mineral industries--Finance; Mining corporations; Mines and mineral resources
    • Format: text