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  • All fields: RMP135
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    • Coal mine underground

    • In Lafayette, Boulder County, Colorado, men wield a pick and a pneumatic tool. They wear hats with lamps; sparkling coal comprises the interior of the mine. An ore car is in the background.
    • Rocky Mountain Photo Company.
    • 1921
    • Coal mine underground Lafayette, Colo.

    • Miners work with a pneumatic drill and a pick near a mine ore car in a mine tunnel near Lafayette (Boulder County), Colorado.
    • Rocky Mountain Photo Company.
    • 1921

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