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  1. 1
    The geology of Poorman Hill and the Poorman Mine, Boulder County Colorado

    The geology of Poorman Hill and the Poorman Mine, Boulder County Colorado by Humphrey, Arthur Gordon

    Published 1955
    Thesis Microfilm Book
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  2. 2
    Geology and ore deposits of the Magnolia Mining District, Boulder County, Colorado

    Geology and ore deposits of the Magnolia Mining District, Boulder County, Colorado by Wilkerson, Albert S.

    Published 1937
    Thesis Microfilm Book
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  3. 3
    Geology of the Lakewood region, Boulder County, Colorado

    Geology of the Lakewood region, Boulder County, Colorado by Sample, Raymond Dewey

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  4. 4
    The geology and structure along a portion of the northern end of the Maxwell Reef, Boulder County, Colorado /

    The geology and structure along a portion of the northern end of the Maxwell Reef, Boulder County, Colorado /

    Published 1944
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  5. 5
    Economic history of tungsten mining in Boulder County, Colorado

    Economic history of tungsten mining in Boulder County, Colorado by Weisberg, Maurice M.

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  6. 6
    Structure of the foothills region from Gregory Canyon to the southern Boulder County line, Colorado

    Structure of the foothills region from Gregory Canyon to the southern Boulder County line, Colorado by Tollefson, Oscar William

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