LIBROS DEL AUTOR: richard e lippoth

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  • Bulkeley Wells And The Uncertain Luck Of The Mining Game
    Richard E Lippoth
    The economics of hardrock mining evolved dramatically during the first decades of the twentieth century as demand for metals surged while mineral deposit grades decreased. The era contains many examples of how the adoption of new technology offset changes in the quality of available mineral resources and the growing number of restrictions placed by society on how the resources ...
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