Books by W. R. Hardwick — EbookNetworking.net

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Open-pit copper mining methods and practices at the Chino Mines Division, Kennecott Copper Corp., Grant County, N. Mex.
W. R. Hardwick
13.99
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Open-pit copper mining methods and practices, Copper Cities Division, Miami Copper Co., Gila County, Ariz.
W. R. Hardwick
13.29
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Block-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz
W. R. Hardwick
13.29
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