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    Milling methods and costs at concentrator of United Verde Copper Co., Clarkdale, Ariz

    Published 1930
    “…Mines Bur. Info. Circ. No. 6343.…”
    Government Document Microfilm Book

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  2. 2
    Cover Image

    Milling methods and costs at concentrator of United Verde Copper Co., Clarkdale, Ariz.

    Published 1930
    “…Mines Bur. Info. Circ. No. 6343.…”
    Full Text (via ProQuest)
    Government Document eBook

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